development

Xbox Series X or PlayStation 5?
This is a question that any person may face while entering the ninth-generation. In this article, we will have a look at the advantages and disadvantages of both consoles so that you can choose the best one. Unlike the 8th generation, Microsoft was cautious about its console and instead of making major changes, tried to evolve the Xbox so that all the Xbox One accessories could be used on the series X/S and tried to make up previous generation mistakes, the Xbox One's hardware weakness and lack of exclusive games . Now they have built the most powerful console of history and bought major first-party studios. On the other hand, Sony wants to continue the path of the previous generation with its successful exclusive games in the last generation so that it can stay at the top of the sales chart.

Designs
Contrary to some of the similarities in Xbox One and PS4 designs , Microsoft and Sony have followed two completely different ways of designing for new consoles. the Xbox has a simpler appearance and a smaller size, but the PS5 is more creatively designed but it’s larger and almost reminds of PS3 fat model designs. While some gamers have complained about the PS4 overheating while playing games like Red Dead Redemption 2 and The Last of Us Part II, the air conditioning works well in PS5 . Unlike the first Xbox One model, there is no power brick beside the Xbox Series X, and the device is still cool and quiet while processing 4K and 120HZ games. You can also use both consoles horizontally and vertically. The PlayStation 5, with its customizable plates, gamers can change the way of how their console look, but the Xbox Series X gives your gaming setup a special grandeur with its integrated black look.

Exclusive games
Sony's exclusive games success over Microsoft in the 8th generation is not denied. Releasing games such as God of war and The Last of Us Part II boosted PS4 sales and even forced Microsoft to buy First Party Studios. The cancellation of some Xbox games, such as Scale Bound and Fable, as well as the run-of-the-mill performance of other exclusives, unlike the seventh-generation, caused Microsoft failure. It can be said that Microsoft's best chance is the backward capability that unlike the PlayStation , runs completely flawless and supports even the Sixth-generation games. Now with the addition of EA Play, a large archive of world premier games is available to Game Pass Users at a low غیر مجاز می باشدt. They also buy more studios after signing one of the most expensive contracts in the history of the video game industry with Bethesda, according to Phil Spencer, head of Microsoft's Xbox.

Looking at Xbox exclusive games, you will find that if you are into racing, shooter, or online games, you can choose this console. But if you are looking for action-adventure games and deeper stories, PlayStation could be your best choice. With the Bethesda contract, we can expect massive RPGs in Game Pass. Also, Sony has announced PS Plus Collection for PS5 which allows you to have access to many PS4 exclusive and multi-platform games like God of War, Battlefield 1, etc.,

Controller
One of the most important strengths of the PS5 is the Dual Sense, which has been released with its adaptive trigger and haptic feedback features. Dual Sense has a cool design and With Astro's playroom, Sony has shown its feature, but we must see if using this feature is easy for other developers or not.

Dual Sense Built-in microphone can be really useful for online players, so you can have a voice chat while playing on TV speakers. Dual Sense Haptic Feedback is a more advanced form of impulse triggers technology used in the Xbox One controller . With this feature, gamers get a real sense of the levels and collisions of the game and find themselves fully in the game environment with 3D sound. adaptive triggers can be added to what we have said. The use of different rifles such as shotguns and bows and arrows will be different in the ninth-generation games of the Sony console, and by adjusting the trigger, you will feel even harder arrows and bows due to the stretch, as well as more difficult to shoot with shotguns. Motivation.

On the other hand, Microsoft has tried to keep its design with minor improvements over the Xbox One controller. They have added a new “share” with redesigned D-pad with more comfortable bumpers. Dual Sense includes problems with the adapter trigger after a while. Also, the use of batteries in the Xbox Series X controller is unpleasant for some gamers.

Hardware
The two ninth-generation consoles are equipped with AMD processors and ZEN 2 architecture with eight similar cores, but there are differences in the GPU. The Xbox series X GPU with 12.5 teraflops of processing power is up against 10.28 teraflops of PlayStation with more numbers of CUs, but both have a custom AMD RDNA 2 architecture. Both consoles have 16GB of GDDR6 RAM, but the maximum amount of PlayStation’s bandwidth is more than the Xbox Series X.

Thanks to the high-speed SSD of PS5 and Xbox Series X, the ninth generation has no longer a boring loading and almost all games load in a few seconds, but due to this generation huge games, 670 GB of PlayStation accessible memory may not be enough and According to Sony, it is not possible to add external memory at the moment, but when this problem is solved with the updates, it’s not too easy. However, you can buy an external SSD for your Xbox Series X right now and use it as easily as old memory cards. PS5’s storage speed has surpassed the Xbox in loading games with a little difference. At gaming tests, these two consoles have been able to cope well with Ray Tracing and HDR, as well as running some games at 120 frames per second. In terms of repairing, both consoles appear to be at the same level, but using liquid metal in the PlayStation makes it a bit difficult to repair.

UI and software
To show off the Xbox power, Microsoft has added a quick resume feature that lets you open up to 6 games at the same time and switch between them whenever you want, but unlike Sony's simple and light user interface, The Xbox is a bit confusing, and this problem remains unresolved after two generations. Xbox has added a dynamic theme to Series X while Sony had a large variety of themes since PS3.

These Two new consoles support Backward compatibility in different ways. Thanks to the Integrated architecture of Xbox consoles , you can Run 4 generation games on Xbox Series X. On the other hand, PS5’s compatibility is limited to PS4. Microsoft engineers have done another miracle besides Backward compatibility. They have been able to greatly increase the refresh rate of eighth-generation games using FPS Mode. Now some previous generation games have even reached 120 frames per second which are wonderful.

Microsoft and Sony are focusing on cloud services with developing project xCloud and PS Now. With xCloud you can play Xbox games on your phone or Personal Computer on the same saved data. PS Now also recommends a good archive that you can play some PS4 and PS3 games on your PlayStation 5.

Price and availability
It can be said that both companies have suffered losses to launch their consoles at a reasonable price, but this loss will be compensated by selling games and subscriptions. You must know that new games in the 9th generation will غیر مجاز می باشدt 10 more dollars which is 70$. We must remind that with the rising غیر مجاز می باشدt of making games, this is not much after years of price stability. Also, a while ago Microsoft decided to increase Game Pass Ultimate and Gold subscription price which was criticized by many gamers. Not only they did not increase the price but also eliminated the need for free games for Gold subscription. Note that Sony did not require PS plus for free games for ages.

Due to the coronavirus pandemic and its limits, the inventory of both consoles was limited, especially in the pre-order and first days of release, and this led to staggering prices on eBay and Both manufacturers have promised to stock up on stores. Both consoles have 499$ price tag, which of course may be unfair that the Xbox presents more power and memory, at least on paper.

Conclusion
However, we are at the beginning of the new generation and multi-platform games that can show the true power of both consoles have not been released yet and we can’t make an accurate graphical comparison between the two consoles and it can be said that the ninth-generation changes are not significant but impressive. Many factors are influencing your decision to buy and choose one of these consoles. You may be impressed by the next God of War and Dual Sense features, or choose the Game Pass and upcoming Xbox exclusives such as Fable and Halo infinite.

Source:https://www.dotnek.com/Blog/Games/xbox-series-x-or-ps5-which-one-to-buy

The height of Xbox Series X is seven centimeters shorter. Another point that needs to be mentioned is that both of these consoles are ranked among the heaviest available consoles due to date.

Design and dimensions of PS5 and Xbox Series X
Based on official information at Sony.com, the ninth generation of PS5 is six centimeters taller than its foe. The new console of Sony is much higher than the new Xbox. It reaches 37.8 centimeters. The height of Xbox Series X is seven centimeters shorter. Another point that needs to be mentioned is that both of these consoles are ranked among the heaviest available consoles due to date. The optical version of PS5 is almost 4.5 kilograms, and the digital version that is cheaper and doesn’t have any optical drive is nearly 3.9 kilograms. The new Xbox's weight is almost the same as its competitor, but Xbox Series S is way lighter than the digital version of PlayStation , its 1.93 kilograms.

Microsoft did a fair job designing the new Xbox, and It has a cubic shape, and thanks to its black color, you can match it with many of the things in your room. On the other hand, the new PlayStation has a rectangle shape. It has a modern look, but it’s a little bit difficult to match with the room, but possible because of its white color.

Well, by its looks, Xbox Series X has more processing power than the PlayStation 5, but we have to make sure of this in action.

The processing power of PlayStation 5 and Xbox Series X     
At the very own core of Xbox Series X, we have a powerful AMD chip customized exclusively for this console. Microsoft and AMD, despite their last generation differences, did a great collaboration on this. Eight 7nm Zen 2 processing cores are included in this chip, and we have SMT capability to run sixteen threads in parallel.

Xbox Series X has 16GB of GDDR6 memory with a 320-bit interface. If we look at the console's storage part, we see a one terabyte NVMe SSD with a transfer rate of 2400 MB per second. You can also attach other SSDs to the device by the ports in the back of the console.

Again, in PS5 , we also have eight 7nm Zen 2 processing cores, but they are slightly weaker than Xbox because they clock at 3.5 GHz and Xbox clock at 3.8 GHz. PlayStation 5 also has 16GB of GDDR6 RAM and a 256-bit interface. The thing is that PlayStation is more successful in real action, although on the paper it seems a little weaker, but it can run 4K resolution, Ray Tracing On games with higher frame rates and more graphic details. Kudos to Sony for this console.

 PlayStation 5 and Xbox Series X controllers
Xbox Series X controllers did not change drastically compared to the last generation, but it’s an acceptable upgrade. The new controllers seem a lot like the Xbox Elite controllers on the market. The circular pad of the controller has an ergonomic design which is really better than the last generation. You can also use this controller on Windows 10 devices without any problem. Also, keep in mind that you can use the previous generation controllers on the Xbox Series X, but some customers reported that it doesn’t function well, and sometimes it disconnects. Microsoft declined these accusations, but they released an update a few months ago, and now it seems like that it’s solved. If you want a new experience, I suggest you use the new controllers.

On the other hand, PlayStation controllers changed entirely in terms of design, and now instead of DualShock, we have DualSense, which is really cool.

DualSense enhances user experience, and the new PlayStation Controllers are very much similar than before to the Xbox. We have adaptive triggers on the L2 and R2 buttons, and they function and vibrate better than before. Haptic touch is another feature of the DualSense and replaced the old school DC vibration. Xbox had this feature before, but now we get to experience it on the PS5.

Conclusion
Xbox consoles are cheaper than PlayStation, but Microsoft, contrary to Sony, has not yet announced tempting exclusives for its console, and they are buying many new studios. Probably we see some of the great exclusives in the middle of the generation, but for now, Sony is one more step ahead because it has introduced more tempting exclusives and have a much clearer path for their fans, compared to Microsoft that we don’t know many things from its progress in making new exclusives

Finally, I have to say that maybe buying the PlayStation is a better option because of Sony's exclusive games and better support of buyers, and a lovely controller. Although some time has passed since the beginning of the generation, Microsoft has not yet shown much of its original exclusives. Of course, do not forget the Game Pass, you can use Game Pass to get access to many games for only ten dollars a month, and Sony has not yet provided such a service for gamers . But I have to say that buying a console is a personal choice, and some people may prefer the new Xbox to the PlayStation. It's totally up to you.

Source:https://www.dotnek.com/Blog/Games/comparing-playstation-5-and-microsoft-xbox

Servers help users get the answers to their questions in a short while, in fact, when you make a request in a browser, the browser receives and sends information about the answer to your request from the server, information security is very important and all people who deal with the Internet and computer systems are constantly trying to increase the security of their system by taking measures to prevent hackers from infiltrating their systems, it should be noted that hackers are trying to be able to add to their science and knowledge and their power day by day in the field of computers and hacking given that users are trying to increase the security of their systems, so that hackers try to improve their acknowledgement in order not to be stopped by any obstacles, in this article, we are going to discuss how servers are being hacked, but before that, you need to know a little more about the definition of a server.

What is a server?
Simply put, servers are computers that share information with other computers, the servers have a software section as well as hardware, and hackers target the software section more, and by entering this section, they finally gain a lot of information, which we will discuss in more detail later, of course, ethical hackers are constantly trying to find security holes in web servers, and they use exactly the same methods that malicious hackers use for the server, with the difference that the purpose of these hackers is different and if a white hat hacker can hack the server through a path, they will report quickly, so that all security holes will be closed and the way for malicious hackers to enter will be blocked as well.

How can servers get hacked?
Initially, hacking needs gathering information about the goal they intend to achieve, in order to collect information, it is necessary for hackers to gather complete knowledge about the relevant server, its hardware and software parts, configuration, address, etc., gathering information is actually an important part of hacking a server, and if this step is not done properly, taking other steps are somehow impossible and hackers will not be able to reach their goal, the next step is to find the vulnerabilities of the server, so that hackers can access the server through these points, in order to do this, hackers usually use tools to scan for server vulnerabilities, in fact, these tools can check all the security issues on the server and let the hacker know the weaknesses, for example, if the server has a weakness in choosing a password which can be easily obtained, they will let the hackers know about this weak point, other vulnerabilities of a server that may be found by these tools may include incorrect configuration of software on the server, non-updated software on it, and so on.

Hackers may use the following tools to scan servers:
1- Nessus:
Nessus can provide a lot of information to hackers, it can find and report vulnerabilities on a server, using this tool requires payment, but hackers can regain the money which they have spent quickly.

2- Nmap:
Nmap is one of the most popular tools that can be used to identify vulnerabilities in a server.

3- Nikto:
Nikto works like Nessus, but the thing about this tool is that if an intrusion detection tool is used, the hacker who have used this tool can be easily detected.

4- OpenVAS:
This tool is also used to identify server vulnerabilities.

5- Metasploit:
How to work with this tool is very simple and even a novice hacker can easily use it in order to access vulnerabilities in a server.

6- HTTrack:
This tool allows a complete analysis of a server.

7- Maltego:
These tools are very suitable for analyzing servers and can provide other possibilities for hackers.

8- Netsparker:
All programs and services on the server can be scanned by this tool.

9- ScanMyServer:
This tool can be used for free in order to find out the security holes.

-The main stage is hacking, in which after collecting data and finding vulnerabilities in a server, the hacker begins to implement the things that must be done in this step, hackers take advantage of the weaknesses which they have identified through existing tools and use them in order to hack, there are different kinds of attacks that hackers use, which we will mention some of them below.

Types of hacker attacks on servers:
- injection attacks:
One of the attacks that hackers use is injection attacks , in which hackers use malicious code that causes damage to the server.

- DOS attack:
Denial-of-service attack is a type of attack that affects the services provided by the server and causes errors in it, which is one of the attacks that hackers use a lot and affect the servers.

- Website defacement:
Through these attacks, hackers modify the server and replace the sites on the server with one of their own servers, and by using this attack, they try to achieve their goal.

- Phishing Attack:
It is a type of cyber-attack in which hackers send a fake mesغیر مجاز می باشدe, endangering all user data.

Through these attacks, hackers can easily access people's information as well as online accounts and cause malicious damage to the system, and hackers may gain a lot of money through the information which they have obtained about the user's credit card, or make the most of other important information they have obtained related to a particular subject, which is the main reason that all users should be fully aware of phishing, so that they can take care of themselves and ensure the security of their information . Phishing attacks have different types, including phishing email, deceptive phishing, spear phishing, vishing, pharming attacks, each of which has lots of details and hackers use them to hack various things such as servers, etc.

In general, hackers can eventually edit the information and content on the server through the items we have mentioned, and by changing the valuable contents in it into malicious contents, cause a decrease in the reputation of sites on the server, it is also possible that hackers put malicious links in the content while editing, which also reduces the value of existing content as well as the credibility of the site, another step that may be taken by hackers to hack servers is that if a user visits a site that has been manipulated by hackers, malware is installed on their system and the hacker can access a lot of personal and important information of users through it.

When sites lose their credibility, their owners try to find out the reason which is causing their sites to lose their credibility, and they will eventually find out that the problem is with the server and hackers have been able to hack the system through the server, at this time site owners can complain about the server that hosted their site, all of which finally will cause a lot of damage to the owners of sites and servers, as a result, the security of all items must be observed properly, and before security is affected by black hat hackers, etc., the owners of the servers can get help from white and red hat hackers in order to protect their information and check the security of the server, so that if there are security holes, they can quickly check and fix them properly.

Last word:
Servers have a great impact on the speed of loading the site, etc., nowadays, time is of great value to all users, as a result, sites that have a high speed on the search engine results page, can achieve a high ranking and ultimately attract organic traffic to their sites, eventually sites use servers to increase their speed, and if these servers are noticed by hackers, and they have many weaknesses after scanning, it can cause a lot of problems for users, so it is necessary to remember all the points related to server hacking and try to choose a secure server for your site with complete mastery of these issues in order to protect your important information from being stolen.

Source:https://www.dotnek.com/Blog/Security/how-can-servers-get-hacked

Youtube:https://youtu.be/3e0kI6QxuKk

In order for local applications to have access to the web, special settings must be made in their design so that they can finally access the web. This article teaches you how to create a class and access the web through the created classes. If you want to know how to create classes in the application and access the web through classes, it is recommended to follow this tutorial.

In this section you will learn:
- How to use NuGet Package Manager to add Newtonsoft.Json to Xamarin.Forms projects.

- How to create classes that also have access to the web.

- How to use the classes created to access the web?

The requirements for doing this training are as follows:
- Install the latest version of Visual Studio 2019 on the system

-  Install the latest version of Mobile development with .NET on the system

Learn how to add Newtonsoft.Json to Xamarin.Forms projects with NuGet Package Manager using Visual Studio
1- Open Visual Studio.

2- After opening Visual Studio , you need to create a new black Xamarin.Forms app.

3- Choose a name to create. The name chosen in this article is WebServiceTutorial.

4- It is better to be careful in choosing names for the projects and classes created.

Note:
The name chosen for the project must be the same as the name chosen for the solution, so choose the solution name WebServiceTutorial.

5- After naming, you must make sure that the system and application support the .NET Standard mechanism for shared code.

This mechanism is used to share code written in Xamarin.Forms with the C # programming language. If your system and app do not support this mechanism, it cannot have multiple outputs on multiple platforms at once. Therefore, in order to be able to have multiple outputs on several different platforms at the same time, you must be sure that your app and system support this mechanism.

6- Right-click in the Solution Explorer section of the WebServiceTutorial project.

7- Select Manage NuGetPackeges.

8- In the NuGet Packages Manager section, select the Brows tab.

9- Search for Newtonsoft.Json, then install it and add it to the project.

10- Build a Solution to ensure there are no errors.

Learn how to create classes in Xamarin.Forms that also have access to the web using Visual Studio
1. In the Solution Explorer section of the WebServiceTutorial project, create a new class called Constants and add it to the project.

2. Replace all the code listed below with the code in the Constants.cs section.

namespace WebServiceTutorial
{
public static class Constants
{
public const string OpenWeatherMapEndpoint = "Error! Hyperlink reference not valid.";
public const string OpenWeatherMapAPIKey = "INSERT_API_KEY_HERE";
}
}

By entering the above code, you define two constants. OpenWeatherMapEndpoint is an endpoint versus web request, and OpenWeatherMapAPIKey displays your personal API key for OpenWeatherMap.

3. In the Solution Explorer section of the WebServiceTutorial project, create a new class and name it WeatherData and add it to the project.

4.  Replace all the codes listed below with the codes in the WeatherData.cs section.

using Newtonsoft.Json;

namespace WebServiceTutorial
{
public class WeatherData
{
[JsonProperty ("name")]
public string Title {get; set;}

[JsonProperty ("weather")]
public Weather [] Weather {get; set;}

[JsonProperty ("main")]
public Main {get; set;}

[JsonProperty ("visibility")]
public long Visibility {get; set;}

[JsonProperty ("wind")]
public Wind {get; set;}
}

public class Main
{
[JsonProperty ("temp")]
public double Temperature {get; set;}

[JsonProperty ("humidity")]
public long Humidity {get; set;}
}

public class Weather
{
[JsonProperty ("main")]
public string Visibility {get; set;}
}

public class Wind
{
[JsonProperty ("speed")]
public double Speed {get; set;}
}
}

By entering this code, you define four classes that are used to model the recovery of JSON data.

5. In the Solution Explorer section of the WebServiceTutorial project, create a new class called RestService and add it to the project.

6.  Replace all the codes listed below with the codes in the RestService.cs section.

using System;
using System.Diagnostics;
using System.Net.Http;
using System.Threading. Tasks;
using Newtonsoft.Json;

namespace WebServiceTutorial
{
public class RestService
{
HttpClient _client;

public RestService ()
{
_client = new HttpClient ();
}

public async Task GetWeatherDataAsync (string uri) {
WeatherData = null;
try
{
HttpResponseMesغیر مجاز می باشدe response = await _client. GetAsync (uri);
if (response. IsSuccessStatusCode)
{
string content = await response. Content.ReadAsStringAsync ();
weatherData = JsonConvert.DeserializeObject (content);
}
}
catch (Exception ex)
{
Debug.WriteLine (" tERROR {0}", ex. Mesغیر مجاز می باشدe);
}

return weatherData;
}
}
}

By entering this code, you define the GetWeatherDataaAsync method. This method uses the HttpClient.GetAsync method to send a GET request to the web API. The web API sends a response that is stored in the HttpResponseMesغیر مجاز می باشدe object. The response contains the HTTP status code, which is used to determine if the HTTP request was sent successfully.

If the request is successful, the web API will respond with HTTP status code 200 (OK) and JSON response.

7. Build a Solution to ensure that there are no errors.

Learn how to use classes in Xamarin.Forms to access the web using Visual Studio
1- In the Solution Explorer section of the WebServiceTutorial project, double-click on MainPage.xaml.

2- Replace all the codes listed below with the codes in that section.

By entering this code, you specify a UI for the page. This UI includes an Entry, a Button and a number of Labels in the Grid.

3- In the Solution Explorer section of the WebServiceTutorial project, open the MainPage.xaml file.

4- Double click on MainPage.xaml.cs and replace all the codes listed below with the codes in that file.

using System;
using Xamarin.Forms;

namespace WebServiceTutorial
{
public partial class MainPage: ContentPage
{
RestService _restService;

public MainPage ()
{
InitializeComponent ();
_restService = new RestService ();
}

async void OnButtonClicked (object sender, EventArgs e)
{
if (! string. IsNullOrWhiteSpace (cityEntry.Text))
{
WeatherData = await _restService.GetWeatherDataAsync (GenerateRequestUri (Constants.OpenWeatherMapEndpoint));
BindingContext = weatherData;
}
}

string GenerateRequestUri (string endpoint)
{
string requestUri = endpoint;
requestUri + = $ "? q = {cityEntry.Text}";
requestUri + = "& units = imperial"; // or units = metric
requestUri + = $ "& APPID = {Constants. OpenWeatherMapAPIKey}";
return requestUri;
}
}
}

The OnButtonClicked method is executed when the Button is hit.

5- Press the start button or the Ctrl + F5 key combination to see the result of the applied changes.

The requirements for doing this training are as follows:
- Install the latest version of Visual Studio for Mac on the system

- Install the latest version of support platform for Android and iOS on the system

- Install the latest version of Xcode on the system

Learn how to add Newtonsoft.Json to Xamarin.Forms projects with NuGet Package Manager using Visual Studio for Mac
1- Open Visual Studio for Mac.

2- After opening Visual Studio for Mac, you need to create a new black Xamarin.Forms app .

3- Choose a name to create. The name chosen in this article is WebServiceTutorial.

4- Note: It is better to be careful in choosing names for the projects and classes created.

Note:
The name chosen for the project must be the same as the name chosen for the solution, so choose the solution name WebServiceTutorial.

5- After naming, you must make sure that the system and application support the .NET Standard mechanism for shared code.

This mechanism is used to share code written in Xamarin.Forms with the C # programming language. If your system and app do not support this mechanism, it cannot have multiple outputs on multiple platforms at once. Therefore, in order to be able to have multiple outputs on several different platforms at the same time, you must be sure that your app and system support this mechanism.

6- Right-click on the Solution pad of the WebServiceTutorial project.

7- Select Manage NuGetPackeges.

8- In the Newtonsoft.Json window, search for Add Packages, then install it and add it to the project.

9- Build a Solution to ensure there are no errors.

Learn how to create classes in Xamarin.Forms that also have web access using Visual Studio for Mac
1- In the Solution pad section of the WebServiceTutorial project, create a new class called Constants and add it to the project.

2- Replace all the code listed below with the code in the Constants.cs section.

namespace WebServiceTutorial
{
public static class Constants
{
public const string OpenWeatherMapEndpoint = "Error! Hyperlink reference not valid.";
public const string OpenWeatherMapAPIKey = "INSERT_API_KEY_HERE";
}
}

By entering the above code, you define two constants. OpenWeatherMapEndpoint is an endpoint versus web request, and OpenWeatherMapAPIKey displays your personal API key for OpenWeatherMap.

3- In the Solution Explorer section of the WebServiceTutorial project, create a new class and name it WeatherData and add it to the project.

4- Replace all the codes listed below with the codes in the WeatherData.cs section.

using Newtonsoft.Json;

namespace WebServiceTutorial
{
public class WeatherData
{
[JsonProperty ("name")]
public string Title {get; set;}

[JsonProperty ("weather")]
public Weather [] Weather {get; set;}

[JsonProperty ("main")]
public Main {get; set;}

[JsonProperty ("visibility")]
public long Visibility {get; set;}

[JsonProperty ("wind")]
public Wind {get; set;}
}

public class Main
{
[JsonProperty ("temp")]
public double Temperature {get; set;}

[JsonProperty ("humidity")]
public long Humidity {get; set;}
}

public class Weather
{
[JsonProperty ("main")]
public string Visibility {get; set;}
}

public class Wind
{
[JsonProperty ("speed")]
public double Speed {get; set;}
}
}

By entering this code, you define four classes that are used to model the recovery of JSON data.

5- In the Solution pad section of the WebServiceTutorial project, create a new class and name it RestService and add it to the project.

6- Replace all the codes listed below with the codes in the RestService.cs section.

using System;
using System.Diagnostics;
using System.Net.Http;
using System.Threading. Tasks;
using Newtonsoft.Json;

namespace WebServiceTutorial
{
public class RestService
{
HttpClient _client;

public RestService ()
{
_client = new HttpClient ();
}

public async Task GetWeatherDataAsync (string uri)
{
WeatherData = null;
try
{
HttpResponseMesغیر مجاز می باشدe response = await _client. GetAsync (uri);
if (response. IsSuccessStatusCode)
{
string content = await response. Content.ReadAsStringAsync ();
weatherData = JsonConvert.DeserializeObject (content);
}
}
catch (Exception ex)
{
Debug.WriteLine (" tERROR {0}", ex. Mesغیر مجاز می باشدe);
}

Return entering this code, you define the GetWeatherDataaAsync method. This method uses the HttpClient.GetAsync method to send a GET request to the web API. The web API sends a response that is stored in the HttpResponseMesغیر مجاز می باشدe object. The response contains the HTTP status code, which is used to determine if the HTTP request was sent successfully.

If the request is successful, the web API will respond with HTTP status code 200 (OK) and JSON response.

7- Build a Solution to ensure that there are no errors.

Learn how to use classes in Xamarin.Forms to access the web using Visual Studio for Mac
 1- Double click on MainPage.xaml in the Solution pad of the WebServiceTutorial project.

 2- Replace all the codes listed below with the codes in that section.

By entering this code, you specify a UI for the page. This UI includes an Entry, a Button and a number of Labels in the Grid.

3- In the Solution Explorer section of the WebServiceTutorial project, open the MainPage.xaml file.

4- Double click on MainPage.xaml.cs and replace all the codes listed below with the codes in that file.

using System;
using Xamarin.Forms;

namespace WebServiceTutorial
{
public partial class MainPage: ContentPage
{
RestService _restService;

public MainPage ()
{
InitializeComponent ();
_restService = new RestService ();
}

async void OnButtonClicked (object sender, EventArgs e)
{
if (! string. IsNullOrWhiteSpace (cityEntry.Text))
{
WeatherData = await _restService.GetWeatherDataAsync (GenerateRequestUri (Constants.OpenWeatherMapEndpoint));
BindingContext = weatherData;
}
}

string GenerateRequestUri (string endpoint)
{
string requestUri = endpoint;
requestUri + = $ "? q = {cityEntry.Text}";
requestUri + = "& units = imperial"; // or units = metric
requestUri + = $ "& APPID = {Constants.OpenWeatherMapAPIKey}";
return requestUri;
}
}
}

5- The OnButtonClicked method is executed when the Button is hit.

6- Press the start button or the Ctrl + F5 key combination to see the result of the applied changes.

Finally, you were able to do the following:
- How to use NuGet Package Manager to add Newtonsoft.Json to Xamarin.Forms projects.

-How to create classes that also have access to the web.

-How to use the classes created to access the web

Source:https://www.dotnek.com/Blog/Apps/how-to-access-the-web-with-the-application-in

Site security is of a great importance and if all the points that are necessary in order to keep a site safe are not followed properly, the information that you have in your system and also your site can be easily stolen by a hacker, there are many of them who are looking for insecure sites, so that they can easily penetrate it through the security holes exist on the website and reach their desired goal, interestingly, the number of these people is increasing day by day, and therefore users' have a huge concern which refers to the security of their site that this feeling of insecurity is the increase of number of hackers, and the question of which is constantly raised in users minds is that who is responsible for security of the site? What are the duties of this person? And lots of other questions that these people are looking for the answers of them on the Internet in order to get desired results, on the other hand, there are people who do not take the security of the site seriously at all, and constantly think that if they have not been hacked so far, then their site has a high security, but this is not a true opinion, and they should take the possibility of not being noticed by hackers into consideration, so it can be a good reason for not being hacked until today, and if a hacker decides to hack their site, he/she can easily implement malicious actions on them, and cause many problems for this people, before giving the answer of the popular question that who is responsible for site security? It is necessary to have an overview of site security.

What is site security?
In simple terms, site security means any action taken to protect a site from being attacked by hackers and cyber attacks, the measures taken to increase the security of the site are different, and due to the important information available on the site as well as the budget, different types of methods should be used in this direction.

Who is responsible for website security?
The security of your site is your own responsibility, people may suggest that you can increase the security of your site with a limited budget, but this is definitely impossible, and if you want to increase the security of your site as good as possible, you need to spend a lot of time and energy in order to a reach your goal.

You can even entrust the security of your site to companies that have specialized people in this field, and you have to pay a lot of money to them, but a disadvantage is that these companies are responsible for the security of many sites, as a result, the security of your site is not the main goal of such companies, so your site may not be much secured.

If you want to know more about the person who is responsible for site security, you need to answer the question of who gives more importance to your site and makes profit out of the success of your site, which the answer of all these questions is you, because you are the one who can definitely help increase the security of your website by learning tips to secure your website, which we will mention in more detail below.

Tips regarding site security:
- Back up your website:
One of the ways you can increase the security of your site is to make a backup of the information of site, to do this, you need to make several backup copies of your site and ensure the security of all those backups, so you need to be able to use them and not lose your site at once due to hacking attacks.

The reason we emphasize that you should not make a single backup and the importance of making several backups, is that if your site is attacked by hackers, it may be through malware and if a copy replaced the backup, it will be attacked again simply, eventually you need to make more backups and keep them in a safe place, so that people who want to damage your site will not be able to access those backups.

- Monitor your website closely and regularly:
Maintaining the security of a site requires regular monitoring to realize the things that happens on the site, and if you feel something suspicious that has happened on your site, you should quickly check everything, so that it will not be damaged seriously, and you can increase your website security and prevent hackers from achieving their goals.

- Install a powerful antivirus on your system:
If your system is infected with a virus, it means that hackers can infect your site with just one move, so you need to install a strong antivirus and update it regularly in order to keep your site secure.

- Use the website firewall:
The firewall specifies that who can access the site, and who cannot access it, using a firewall can help you maintain your site security and block hacker’s way from entering your site, in addition to the things we have mentioned so far, you need to follow other tips in order to be able to compromise the security of your site, but how can hackers endanger the security of your site? Let us give you a brief explanation in this regard.

What do hackers do to endanger the security of the site?
- Malware:
One of the ways that hackers use to compromise the security of your site is through malware, there have been many reports of hackers using malware, in which case hackers create malicious software that endangers the security of your site if it is used by site owners, as a result, you should be aware of not choosing any kind of software for your system and only provide the one you need from reputable sources on the Internet.

- DDoS attacks:
These attacks are also very common among hackers which target and disrupt site traffic, even in some cases, the site owners ask for money to fix the site traffic disruption and return it to its original state.

- Spam emails:
Surely you have encountered a person who has received spam emails, so you know the results, our suggestion to you is not to open suspicious emails at all, so that hackers cannot access the system as well as the site, there are many ways that hackers can use to infiltrate your site, 3 of which will be mentioned briefly in order to make you realize the dangers threaten your site and take your site security more seriously.

Why should you take action to secure your site?
- If your site is hacked, your site’s credibility will be significantly reduced:
Imagine that people want to use your site services and eventually find out that your site has already been hacked, so do you think that it is possible for them to trust your site? Do they enter their personal information on your site?

The answer to this question is definitely no, and people will never choose your site in order to meet their needs.

- In case of a cyber-attack, the غیر مجاز می باشدt of troubleshooting problems of the site is very high:
You may think that you should not spend your time on the security of your site and if hackers attack your site, then you will take the necessary action, but this is a wrong idea, because the غیر مجاز می باشدts that are required in order to increase the security of a site , are certainly much lower than the غیر مجاز می باشدts that are required to solve the problems that arose after the hacking attack.

- Cybercriminals target small businesses:
The smaller a site is, the easier it is to hack, and hackers are constantly looking for easier ways in order to achieve their goal, so try to increase the security of your website and improve your acknowledgement about site security in order to take the necessary steps with more awareness.

Last word:
The security of your site is your responsibility and in this way you can get help from companies that specialize in this field, but never forget that you need to monitor everything yourself and never leave everything to others and only get help from them in this way.

Source:https://www.dotnek.com/Blog/Security/who-is-responsible-for-website-security

Youtube:https://youtu.be/thIWVzTA-AY

The security of computer systems has become an important issue today and users are looking for the best ways to protect the site against malicious programs as well as hackers, in this way, they may use various methods such as using safe passwords, constantly updating the system, using antivirus, not clicking on spam emails or other things that one of the most effective things they can do is to use a firewall.

In the following, we will discuss how effective the use of firewalls is, and we will also examine whether hackers are able to pass the firewalls or not.

What is a firewall?
In fact, firewalls are network security systems which control traffic flow between the Internet and the private network, it also protects a system from illegal access and provides high network security for the system, there are three basic types of firewalls, each of which are going to be briefly described below.

A number of different types of firewalls:
- غیر مجاز می باشد Server Firewalls:
This type of firewall is a network security system that can protect network resources well and provide high security in the connection between internal servers and the existing servers on the Internet.

- Stateful Inspection:
These types of firewalls can also provide high security in the network and use the smartest methods to block unauthorized traffic and ultimately provide high security for the system.

- Packet Filters:
These types of firewalls, compared to other types, have less ability to provide security for the network and analyze all the data that enters or exits the system, and in case of a suspicious act, the data is not allowed to enter the system.

In fact, these types of firewalls are suitable for small networks and do not have a high ability to increase network security for large companies.

The things that firewalls protect the system and information from:
There are different types of firewalls, and each of them protects the computer system against different factors, firewalls detect unauthorized traffic and prevent any further damage quickly.

- They allow the internal attacks to be minimized.

- Firewalls are one of the most suitable tools that can prevent the entry of malware and protect the system against such malware, in addition to the things mentioned above, firewalls have other capabilities, and we are going to mention some of the best firewalls in 2021 below.

The Best firewall of 2021:
- Bitdefender Total Security:
Bitdefender Total Security is one of the strongest security that protects the system against viruses as well as malware, through this firewall, a wide range of items that are necessary for system security can be achieved, by providing one of these firewalls, you can protect information on five devices, for example, you can use the same type of firewall that you have provided for both your personal computer and your mobile device.

Many users use Bitdefender Total Security because of the reasonable price of this firewall and also the fact that it can provide a wide range of security protections .

- Webroot AntiVirus:
This firewall, occupies only a small amount of space, after being installed on the system, and due to its low volume, it takes only a few seconds to install, all users who use this type of firewall give Webroot AntiVirus an acceptable and good score, which has attracted many users to it.

- ZoneAlarm:
ZoneAlarm is one of the best firewalls that requires payment and has many features to use, it should be noted that it also has a Pro version, which has more capabilities compared to the free version of this firewall.

It protects your system against unauthorized incoming and outgoing traffic to the system, in addition to the features which we have mentioned about this firewall, it also has other capabilities, all of which have made it one of the best firewalls available.

- GlassWire:
Among the available firewalls we can mention GlassWire , which is free and also provides many features for users’ data protection, if an unknown device is connected to your system, it will be detected by this firewall and will be reported to you in order to make you aware of this process, so you can disconnect it, if necessary.

In general, if you use this firewall, you can access a wide range of features and keep your information safe from hackers.

- Comodo Firewall:
This firewall, like the previous two, is for free and can control all incoming and outgoing traffic, as a result when a harmful software enters your system, it will quickly block its connection to your system and also alerts you in a case that malware enters your system.

- TinyWall:
This firewall is able to protect the system well against malware and prevent malicious programs from changing Windows firewall settings, using this firewall makes it easier for you to reach your goal while using the Internet without opening pop-up windows and protect your information from hackers, so it prevents your personal and important information from being stolen.

Can the firewall be hacked?
So far we have mentioned a lot of points about firewalls, but you may be thinking about the common question which is whether profiteers can hack firewalls or not, the answer to this question is yes, hackers can bypass the firewall through various ways and gain access to the information, as a result, you can do the following to protect your information more and more.

- Enable multi-factor authentication:
As a result, you can keep your information safe if hackers bypass your security tool , if you use multi-factor authentication, you will make it more difficult for hackers, you should also be very careful in choosing a strong and safe password which is hard to guess in order to make the process as hard as possible.

- Perform penetration test:
By performing a penetration test, you are able to identify the security holes that exist in your system or in the firewall that you use, as a result you can finally choose the appropriate solutions to repair the security holes, and as you know hackers use the same security holes to infiltrate various systems, which you can prevent further malicious events by performing a penetration test.

- Get help from several firewalls at different levels simultaneously:
As we mentioned in this article, each firewall has different capabilities, therefore, if they are being used in combination, can greatly increase system security , each firewall is not strong enough to withstand all attacks which are being occurred by hackers, so several firewalls must be used at the same time in order to achieve the desired results.

In fact, it is possible for each firewall to have security holes, and using another firewall at the same time will eliminate the existing security hole.

- Stay on the top of Security patches:
One of the ways to help you greatly increase the security of your system is to use this method which after using it, you can realize how much security of your system has increased and hackers cannot access the information in your system easily in order to achieve their desired results, despite these tips, firewalls can still protect the information in the system against phishing attacks, DDoS attacks, direct physical access and so on, as a result, you should get help from other available features to increase the security of your system.

Last word:
In general, despite all the points we have mentioned in this article, using firewalls can provide a very high level of security for the system , which you should follow the tips in using firewalls to increase security, so that you can reach your goal with more guarantee and prevent any attack by profiteers, in order to fill the security holes you have to implement all the steps mentioned above, in addition to other steps that you have to take for having a secure system, as a result you shouldn’t provide any security holes due to the fact that hackers are always looking for a way even a small hole to enter your system in order to abuse your information and make the most of them in an illegal way which can cause a huge problem for you.

Source:https://www.dotnek.com/Blog/Security/can-the-firewall-be-hacked-how-much-can-a-fir

after sending the user request to launch the application , it refers to the resources available on the operating system so that they can launch and launch the application. Applications have user interface layouts that exist in XML files.

Applications available on the Android OS have resources that we will teach you in this tutorial.

Basics of application resources in Xamarin.Android
When an application is created for the Android operating system, the resources related to that application are set by the default Xamarin.Android template.

The files that create the default resources are as follows:
icon:
This file has the default Icon.png for the application icon created.

Main.axml:
This file has the default user interface layout for the created application .

Note:
Android supports the xml format while Xamarin.Android uses the axml format.

Strings.xml:
Creates a string table that is used to help localize Word applications.

AboutResources.txt:
This file is not necessary and you can even delete this file because it does nothing special, it just provides an overview of the level of Resources files.

Resource.designer.cs:
This file, unlike the AboutResources.txt file, is very important and is produced by Xamarin.Android . This file has a unique ID's for each source. In fact, this file was created automatically by Xamarin.Android and will be restored from time to time if needed.

How to create resources and access them?
Creating application resources is a very simple and easy task. Add Strings.xml to the file and project. Once added, Build Action is automatically set to AndroidResource. AndroidResource setting is done by Xamarin.Android tool. Doing so will allow you to properly compile the Xamarin.Android tool and embed the resources into the APK file.

Note:
If Build Action is not set up properly on Android Resource, all existing file in the APK will be removed and no attempt to set or upload files will be effective. In this case, you will encounter a runtime error and eventually the application will crash.

Unlike Android, Xamarin.Android is not strict and supports all lowercase and uppercase characters. And you can easily use uppercase or lowercase letters when naming them because Xamarin.Android does not give any error for using uppercase and lowercase letters.

Note:
When naming sources to separate if you use dashes or spaces are not supported and processed. You can use the underline to separate them.

How to access resources added to the file?
There are two ways to use the resources added to the file:
- Use XML files
- Coding to access resources

Access to added resources through coding
To access the available resources by programming method , we must assign a valid and unique identifier for each resource. The unique identifier assigned to each resource is an integer that will be defined within the Resource class.

The code inside the Resource.designer.cs file gives access to the resources, the code inside the Resource.designer.cs file must be as follows to be able to access the added resources:

public partial class Resource
{
public partial class Attribute
{
}
public partial class Drawable {
public const int Icon = 0x7f020000;
}
public partial class Id
{
public const int Textview = 0x7f050000;
}
public partial class Layout
{
public const int Main = 0x7f030000;
}
public partial class String
{
public const int App_Name = 0x7f040001;
public const int Hello = 0x7f040000;
}
}

By entering this code, you are actually assigning a valid identifier to each resource, although the identifiers assigned to the resource are related to the type of resource. For example, when Icon.png was added to the project, the Resource class was updated by Xamarin.Android.

Resource should not be changed manually, as all changes made to it will be replaced by Xamarin. Android .

To access the resources created using the coding method, you can also use the code below:
@ [.] Resource. .

PackageName:
A package whose job is to provide a resource.

ResourceType:
A type of resource that is distributed as described within the Resource class.

Resource Name:
is the name of the source that the source name must be without extension.

Access added resources via XML file

The resources inside the XML file are as follows:
@ [:] / .

PackageName:
A package whose job is to provide a resource.

ResourceType:
A type of resource that is distributed as described within the Resource class.

Resource Name:
is the name of the source that the source name must be without extension.

The code inside the Main.axml file to access resources via the XML file is as follows:
Check if the contents of the Main.axml file are not the same as the code below, replace the code below with the contents of the Main.axml file.

android: orientation = "vertical"
android: layout_width = "fill_parent"
android: layout_height = "fill_parent">
android: layout_width = "wrap_content"
android: layout_height = "wrap_content"
android: src = "@ drawable / flag" />

In this code, ImageView sets the src property to @drawable / flag.

Learn how to set the default resources of applications in Xamarin.Android
Default resources are resources that are not specific to devices and applications , in fact there are specific resources for each application or device that will be selected by default if specific resources are not found by the Android operating system. Default resources exist from the beginning, and if device-specific resources do not run, default resources will run instead of specific resources.

The different types of sources are as follows:
Animator:
XML files are used to describe property animations. property animations for version 3.0 of Android was introduced and launched. property animations are flexible and are a powerful way to produce different types of animations that are used.

Anim:
XML files are used to describe tween animations. tween animations are actually a set of animation commands that are used to make changes to the contents of the View object. For example, rotating and moving images or resizing text in animation uses Tween animations to make changes inside View objects.

color:
XML files that are used to describe a list of colors. Consider an example of changing the color or using the colors in the list, changing the button mode and changing its color. A button can have active or inactive modes, or it can have compressed or non-compressed modes, in which case the color of the button will change as well.

Drawable resource:
In general, it can be said that drawable is a concept used for graphics. Anything related to graphics in the program can be drawable inside. The drawable can be easily compiled within the program, then called by the API or referenced using other XML resources. bitmaps (.png, .gif, .jpg), bitmaps are examples of drawable that can also be resized. Such as state lists and Nine-Patches ...

Layout:
XML files that are used to describe the interface layout, such as an activity or a row in a list.

menu:
XML files that are used to describe program menus such as Context Menu, Options Menu and submenus. Popup Menu Demo and Standard Controls are examples of in-app menus.

Raw:
These are files that are automatically saved in binary type in raw.

values:
are XML files that have simple values. An XML file in the values ​​directory does not define a single source, but several sources.

xml:
are XML files that function similarly to the .NET configuration.

Learn how to set up alternative sources for apps on Xamarin.Android
Alternate resources are resources that are used by the Android operating system in the absence of default resources. If Android is looking for a default source but finds a source that is more accurate than the default source, it will select and run a more accurate source. Of course, if Android does not find an alternative source that is more accurate than the default source, the same default source will be downloaded.

Alternative resources are placed within resource files, such as the default resources, as subcategories of the default resources:

-

Qualifier:
A name used to identify the device configuration. There may be more than one qualifier with one name, in which case the names are separated by a hyphen.

The rules that must be followed when adding Qualifiers to resources are as follows:
- There may be more than one qualifier with a name, each of which is separated by a dash.
- The qualifier may be specified only once.

The different types of qualifiers that are mentioned for resources are as follows:
MNC and MCC:
MCC is used to provide and configure the SIM card while MNC provides the device connected to the network. The values ​​in MNC and MCC are different for other countries and sources. For example, when assigning a qualifier to a country in Germany, the qualifier must be mcc262. When assigning a qualifier to the United States, the qualifier must be mcc310-mnc026. For information on country codes, you can visit http://mcclist.com/.

Smallest Width:
Used to specify the smallest width of the page intended to run the application.

Available Width:
The minimum width of the page that is intended to display the application and the value of this can be changed by rotating the device.

Available Height:
​​​​​​​The minimum height of the screen that is intended to display the application and the amount of this can be changed by rotating the device.

Screen Aspect:
This qualifier is based on the dimensions of the screen, not on the orientation, and does not change with the rotation of the device. The values ​​that can be included in this qualifier are notlong and long.

Screen Orientation:
This qualifier can be changed by rotating the device and the values ​​that are placed in it can be landscape or Portrait.

Dock Mode:
​​​​​​​ is a qualifier that can take car or desk values.

Night Mode:
​​​​​​​ This qualifier is used to determine whether the program is in use during the day or at night. The purpose of this qualifier is to give users the opportunity to use dark or light modes of user interfaces. The values ​​in this qualifier are: notnight and night.

Screen Pixel Density:
Used to specify the number of pixels at a point on the screen.

The values ​​in this qualifier are as follows:
ldpi:
Screen with low density and number of pixels

mdpi:
Screen with medium density and number of pixels

hdpi:
Screen with high density and number of pixels

xhdpi:
Screen with very high density and number of pixels

nodpi:
Resources that have no value

Touchscreen Type:
Used to determine the touch of the screen and the values ​​in this qualifier can be notouch, stylus and finger. The finger is used to specify the touch screen, the stylus is used to define the screen using the stylus, and the notouch is used to specify the non-touch screens.

Keyboard Availability:
Used to determine the type of keyboard used, and its values ​​may change by changing different types of keyboards. The values ​​that this qualifier can take are as follows:

Keys exposed:
In this case, the device has an available and active keyboard, and if there is no software keyboard, the hardware keyboard will be launched.

keyshidden:
In this case, the device has a hardware keyboard, but the hardware keyboard of this device is hidden and of course no software keyboard is active.

keyssoft:
In this case, the device has a software keyboard.

Primary Text Input Method:
This qualifier is used to specify what kind of hardware keys are used for input. The values ​​in this qualifier are as follows:

nokeys:
There are no hardware keys to log in to the app .

Qwerty:
There is a qwerty keyboard.

12key:
There is a hardware keyboard that has 12 hardware keys to enter.

Navigation Key Availability:
Activated when there are 5 directions and of course the values ​​in this qualifier are as follows:

nav exposed:
Navigation and directional keys are active for users to use.

Navhidden:
Navigation keys are disabled for use by users.

How does Android determine which source to use?
In the Android OS, the applications that are produced have a lot of resources and in order for the applications to be launched, they must be run on a source. The number of resources available in Android is high and the question is how the Android operating system determines which source to use.

Android determines the resources bases as follows:
Eliminate contradictory qualifiers:
In this case, if the device orientation is portrait, all directories in the landscape source will be rejected.

Ignore qualifiers not supported:
Not all qualifiers are available for all API levels. If the resource directory has a qualifier that is not supported by the device, that resource directory will be ignored.

 Identify the next highest priority qualifier:
Selects the highest qualifier priority based on the table. Qualifier priority is from top to bottom.

If the Android operating system is looking for specific resources and cannot find them, it will try to find other resources. In this case, the Android operating system may not use the default resources. For example, if the operating system is looking for low-density pixel resources and cannot find them, it chooses medium or high-density pixel resources.

Imagine an application whose resources are as follows:
rawable
drawable-en
drawable-fr-rCA
drawable-en-port
drawable-en-notouch-12key
drawable-en-port-ldpi
drawable-port-ldpi
drawable-port-notouch-12key

This application is run with these resources on a device with the following features and facilities:
Screen density: hdpi
Locale: en-GB
Primary keyboard input method: 12key
Orientation: port
Touchscreen type: notouch

Then, French sources that do not conform to en-GB are removed as follows:
drawable
drawable-en
drawable-en-port
drawable-en-notouch-12key
drawable-en-port-ldpi
drawable-port-ldpi
drawable-port-notouch-12key

All resources that do not comply with the en-GB language will be removed.

After deleting resources that do not comply with the en-GB language, the available resources are as follows:
drawable-en-port
drawable-en-notouch-12key
drawable-en-port-ldpi

Orientation is then performed and all directories that do not match the page orientation are removed:
drawable-en-port
drawable-en-port-ldpi
Then, directories that do not match the page density are removed:
drawable-en-port-ldpi

In this way, the Android operating system selects the appropriate source to use.

Source:https://www.dotnek.com/Blog/Apps/application-resources-available-in-xamarin-an

Computer security includes providing security for various parts that are related to a computer, including hardware, software, network, electronic data, etc., all of which must be protected by strategies, so as not to harm any of the sectors and also not to be attacked by hackers, there are different types of computer security, all of which have the same purpose and do their best to ensure that the site has no security holes and hackers cannot penetrate the site and abuse the important information that may be on that site, site security and hacking are among the topics that are always considered by users, and a large number of keywords related to these topics are often entered by users in the search section of search engine to be able to get the answer to their questions about this field, but again there are still some questions which are created in the user's mind after reading each article, so if you still feel the need to know more about site security, hacking, etc., after reading this article, make sure that you will get the desired answers by visiting our website www.dotnek.com which contains more articles about these topics.

In this article, we try to mention different types of computer security in general, so that you can get acquainted with each one separately.

Types of computer security:
1- Application security:
Application security includes all the measures that find the security holes in the programs and try to fill them and increase the security of the programs as much as possible, of course, most of these measures are done during the development of programs , or you can create tools to protect applications, there are many tools that can help you establish application security and achieve your goal.

In fact, it is always possible to make small or big mistakes while developing or running programs, the most important thing is to solve all the problems as soon as possible through the available tools, so that you can protect your website from hackers and don’t let them use this situation to achieve their desired result.

Application security tools:
This type of security has many tools, two of the most important of them are security testing tools and application shielding products, which we will discuss in the following.

Security testing tools include:
- Static testing:
It allows developers to analyze code correctly and in the right places while developing applications, so that a mistake does not cause security problems for the site in the future.

- Dynamic testing:
In this section, the code is analyzed during execution, and it is possible to examine the attacks that may occur in a more complex way.

- Interactive testing:
This is a combination of the previous ones.

- Mobile testing:
Mobile phones are very important these days and are mostly used more than any another device, and the security of all the apps in it, is important to users, which allows you to check how apps on your mobile phone are being hacked, if you have mastered all these things, you can check the security step by step and protect your information from hackers.

Now it is time to take a look at application shielding products and get familiar with it:

Application shielding products include the following categories:
- RASP:
Runtime application self-protection is very important and many programs use this tool, one of the features that this tool provides for the program is that if a problem occurs, the program will be disabled automatically.

- Code obfuscation:
Protecting code against hacker attacks is so essential, which is possible through code obfuscation.

- Threat detection tools:
These tools examine all possible threats, and through these tools, you are able to create higher security .

2- Information security:
IS stands for information security which is a type of computer security that protects personal and confidential information, and all efforts in this type of security is to keep personal information from being accessed by hackers, information security is based on three basic principles, which are confidentiality, integrity and availability, and there must be at least one of them in order to establish information security, here we are going to explain these factors briefly.

Confidentiality:
This principle of information security means that the personal information should be kept secret from others and should not be shared with anyone in any way.

Integrity:
This principle implies that all the information contained in the computer must be integrated and great you must pay more attention to updating each piece of data.

Availability:
Availability means that all needed information, should be available and can be used easily and quickly.

Another issue that is important in the field of information security which you need to be familiar with is non repudiation, which means that a person who sends a mesغیر مجاز می باشدe cannot deny sending it, and vice versa, the person who receive the mesغیر مجاز می باشدe cannot repudiate it, and pretend that the mesغیر مجاز می باشدe was not sent to him/her, which leads to security.

3- Network security:
One of the most important types of computer security is network security, which means that all efforts are made in this field to create conditions in which all information is stored, as a result, hackers cannot use the information illegally.

Different types of network security:
- Physical Network Security:
In this type of network security, as its name implies, all the necessary facilities are provided to protect the information, which may include, alarms, locks, safe rooms to place computers containing important information, etc., all of which It is done, so that hackers cannot access the information.

- Technical Network Security:
In this type of security, the data that exists in the computer and also the one that is being transferred, in other words, all available information is protected.

- Administrative Network Security:
All users who have access to computers should be monitored and their access to information should be checked regularly, so that malicious activities do not cause serious problems.

In general, network security is essential, and in order to do it properly, steps must be taken, some of which we will mention in the following section.

Different ways to create network security:
- Antivirus and antimalware software:
These pieces of software are so important in establishing network security and the best type of them, check the new information right after entering, and also check them continuously to prevent viruses, worms, ransomware, etc., and let you know whether they exist or not, so they cannot damage your computer.

- NAC:
If you allow access to all parts of the network to many people, you won’t be able to ensure the confidentiality of your information and network security may be in danger, so people should have limited access to the entire network, and you should only allow specific people to access all the information.

- Firewall Protection:
Network traffic control is of a great importance, and firewall protection monitors network traffic that is a kind of threat for network security, it identifies software that intends to enter and disrupt your network via the Internet, and block their access to the network.

- Email Security:
This allows access to emails to be monitored and controlled.

- Mobile Device Security:
Nowadays, mobile phones are so popular and important for users, and they do not want to face problems such as being infected by viruses, etc., in their mobile phones, so it is necessary to have enough control over this field, so that if problems occur, you can solve them and do not make your information available to hackers.

There are several ways to get rid of viruses that infect mobile phones, for example, you shouldn’t Browse unsecured websites TIPS , you should use the right password, try to update programs regularly, etc., all of these ways can prevent the virus from entering your mobile phone and infecting it.

4- Endpoint security:
A device may be remotely connected to your network, which may make it difficult to maintain the security, as it will increase the possibility of hacking , viruses, etc., thus if you need to connect with different devices to the network, take this type of security seriously.

5- Internet security:
Internet security covers a wide range of measures that are taken to protect computer systems connected to the Internet, as well as the security of the browser.

Last word:
In general, computer security is of a great importance, and it is like a branching tree, all of which are to provide security for your computer, in this article, we have briefly described the types of computer security, so that you can use this information to keep your data secure.

Source:https://www.dotnek.com/Blog/Security/what-are-the-types-of-securitywhat-is-the-mai

Youtube:https://youtu.be/86dv-z_zJ5k

Security is an important factor for people all over the world due to the existence of important information which may be stored on the computer or any other system, so you have to provide different facilities to protect this information and not allow others to access it, in the world of computers, security has many details, and to understand each of them, at the beginning, you need to be fully aware of the computer in general, so that you can maintain the security of your site better, security has 7 layers, which we will discuss in the following.

7 layers of security:
1- Information Security Policies:
One of the main layers of information security is Information Security Policies, which gives users the assurance that you give a value to their information and do your best to protect them, the security plans for people who want to protect information must be prearranged and should have a step-by-step process to strengthen the security of your site.

In general, information security policies reflect the thoughts of the media and show all their efforts to protect information, through this layer of security , information can be secured against all existing threats.

This layer of security has 3 main types that we will mention in the following:
- Organizational (or Master) Policy

- System-specific Policy

- Issue-specific Policy

2- Physical Security:
This layer of security is always an important for many people, and they regularly provide facilities through which they can establish physical security to protect information, in the real world, if you have a valuable object, such as money, jewelry, documents, etc., you maintain this layer of security as fully as possible, for example, if you leave that valuable object in a safe place, or give it to someone who you trust, you are not worried about protecting them.

The same thing is also true for computers, generally, physical security is defined as the protection of hardware and software components, networks, and data from natural physical conditions and events, which may cause serious damage to an organization and the information contained in them, in other words, physical security includes all measures to protect all hardware, information and software available against theft, natural disasters, etc., in order to achieve this kind of security, you must pay attention to some tips which help you keep your information safe.

There may be different tips about the ways of establishing this layer of security which are different from each other, to establish this layer of security, you may choose a safe room with CCTV cameras, or restrict the access of different people to this room, which can also help you in protecting important information and other solutions that exists to ensure you that physical security is set up properly, it should also be noted that different there are different threats for this section, including, abnormal weather conditions, pouring coffee on the computer, people who target your information, etc., to establish security for each of these threats, certain principles are required.

3- Secure Networks and Systems:
This layer of security is very widespread, which includes all measures, equipment, etc., which cause the security of the system and the network to be integrated, and prevent any threatening factors from entering your system, and ultimately provide security for you.

Network security has 3 types, which we are going to discuss in the following.
- Physical Network Security:
This type of network security control is to protect information and prevent illegal access to the system.

- Technical Network Security:
This type is so important and protects all the data that is in the computer, including the one that is being transferred from the computer or the data that is entering the computer, in order to establish the security of this layer, you must pay attention to many points.

- Administrative Network Security:
As you know, the behaviors of users who have access to information, cannot be controlled, and you must provide facilities in advance, so that you can prevent any event that affects the security structure of the network, one of the things that can be done in this section, is restricting people's access to all information, which is an effective way to prevent a series of unfortunate events.

In general, in this layer of security , you can do the following:

- Network Access Control

- Antivirus and Antimalware Software

- Firewall Protection

- Virtual Private Networks

_...

4- Vulnerability Programs:
Despite the spread of cyber attacks and loss of information which they cause, and the daily progress of hackers, security layers have received more attention from users, and they try to study and search in this field to have control over each layer and implement all the necessary strategies to protect their information, hackers are constantly scrutinizing the weaknesses of a system and use these weak points to attack the system and its information, so they get their desired results through them.

In this layer of security, you must pay more attention to the vulnerabilities of a system, all of these weak points have to be identified through various tools, then you should try to do your best to solve the problem because that weak points must be strengthened in order to increase security in general, so you can improve your system security by paying attention to all points.

5- Strong Access Control Measures:
This layer of security has a great impact on establishing security in general, and all the actions that are taken in this layer, ultimately, are aimed at controlling people's access to information, to achieve this goal, various solutions can be taken, including the solution of setting passwords which are hard to be guessed, which should include more than 8 characters, so it is hard for people to guess this password, as a result they cannot access your information easily.

This layer of security contains the following 3 types:
- Discretionary Access Control (DAC)

- Managed Access Control (MAC)

- Role-Based Access Control (RBAC)

6- Protect and Backup Data:
This layer of security helps you to have no worries about the stored information, and it is constantly recommended in this layer to provide backup information, so that in case of unexpected events, your information won’t be damaged and will be protected as much as possible, there are a number of ways you can get help from them in order to implement this layer properly, including keeping information in a safe place other than the current information system that helps you maintain your information safe. It should be noted that it is necessary to establish the security for the information from which you have made a backup.

7- Monitor and Test Your Systems:
In this layer, you should review all the actions you have taken and examine all the aspects, so that you can identify the possible dangers that threaten your information and system, in general, the system monitoring process helps you solve these problems and does not allow a problem to occur, which causes damage to your system or loss of your information.

To implement this layer, there are various tools which will help you achieve your goal, some of which we are going to mention in the following section.

- SolarWinds Server and Application Monitor

- NinjaRMM

- PRTG - OpManager by ManageEngine

- OpenNMS
- WhatsUp Gold

- OpenNMS

Last word:
In general, security layers are of a great importance and each of them has a separate world that in order to be able to create a flawless and integrated security, you must implement all the necessary strategies, we tried our best to provide you with some general information about each of the security layers, as a result, you can finally prevent hackers from accessing your information due to the fact that if they access your personal information, they will try to abuse them which is a big trouble for you, so you can prevent this from happening by mastering all the layers and not let your site be hacked , which help you not to create a bad user experience for your users due to the fact that they are not worried about the loss of their personal information.

Source:https://www.dotnek.com/Blog/Security/what-are-the-7-layers-of-security

Youtube:https://youtu.be/pgPOFx-YLLU

People who have an account in Google search engine are always concerned about whether Google is safe from being hacked and are looking for ways to protect their account from being hacked, hackers try to steal people's information and use them negatively in other words they try to abuse them, so while using Google or any other search engine, you must be careful of hackers and protect your information from them, to stay safe from being hacked by them, you must pay attention to some points which by getting help from them, you can keep yours information safe from these kinds of attacks, we are going to mention the points that should be considered in the following.

- Password:
One of the things you need to keep in mind in order to make it difficult for hackers to access your information on Google is the password that you choose, many people may prefer mobile phone number, child name, year of birth, etc., as the password that they used to log in to their Google account, which can be easily guessed by hackers , as a result, you should change your password and select the one that contains more than 8 characters, and it also uses a combination of letters, numbers, etc., so that the hacker needs to spend more time to reach it.

- Use password alert:
A password is required to log in to different sections as well as accounts in different search engines, sometimes people use the same password for all of these parts, if a person use the same password for all of his/her accounts, the hacker will be able to access all the accounts by hacking one of them, so they must choose a separate one for each of them, to prevent this from happening, you can download a password alert from Chrome, it will alert you if you choose the same password for multiple accounts.

- Manage your passwords with KeePass:
Today, as we mentioned, each person may have multiple user accounts, each of which must provide a separate password due to the points that we have mentioned above, so how do you remember all of them? KeePass and similar tools can help you increase the security of your site and help you not to forget your passwords, so you need to specify a password for KeePass and track all other passwords through it, it even has the ability to choose the passwords automatically.

- Do not open spam emails:
One of the most common ways that hackers can access your account is by sending a spam email to you, in a way that if you open the email and click on the received links, your account will be easily hacked, mesغیر مجاز می باشدes that ask you to give them your personal or bank card information, etc., may be spam emails, and you should be careful of them.

- Update your software:
Software updates help you prevent hackers from hacking your Google Account, if you have software that is not up to date, hackers can easily access your information and hack your account, so that updating Google Chrome is so important, and you should make sure that you are using the latest version available.

- Remove additional programs:
The more apps you install, the more likely you are to be attacked by hackers on your Google account, so remove the apps you do not need in order to increase the security of your account, another point to keep in mind is not to use unknown sources to install the programs you need, because there may be malware that wants to attack your site.

- Use Google Security Settings:
Enable two-step verification, as a result, even if the hacker finds your password, he/she will not be able to access your account, in fact every time you or someone else wants to log in to your account, you will be given a mesغیر مجاز می باشدe that you must confirm in order to login to your account.

- Check important security events in your account:
Google has a feature that allows you to check all the important events related to the security of your account, if you encounter a suspicious item, you can make changes such as changing the password immediately to protect your account and keep your important information safe from hackers .

- Add a recovery phone and email:
To increase the security of your account, you may have to change your password regularly, so there is a possibility that you forget the latest password that you have chosen, so you need to add your phone or recovery email in order to access your account easily, and even if your account is attacked by hackers, you will be able to get it back as soon as possible by getting help from them.

- Delete unknown devices that have access to your account:
You may find out that some devices other than yours have access to your account, or you have logged in to your account from a device before, but now you are no longer logged in through that device, we suggest you to delete these devices immediately, so that hackers cannot access your account through these devices.

- Set up Inactive Account Manager:
One of the features that Google has provided for its users is Inactive Account Manager, through which you can log in to your account even if you don’t have access to it, which help you keep your information, and you are not worry about losing your information anymore.

- Install antivirus:
Your account may be attacked by one of your software programs which was infected by the virus, the solution is that you should install antivirus , which will help you to identify and remove these kinds of software programs quickly, which can help you prevent hacking and keep your account secure.

In addition to the tips that we have taught you in this article, there are other tips that you can follow to avoid being hacked, but in general, there are different ways to hack people's accounts, some of which will be covered in the next section:

- Attractive mesغیر مجاز می باشدes:
Imagine that you are surfing the Internet, and then you come across a mesغیر مجاز می باشدe that says you have won a prize, and you have to click on the link which is given in that mesغیر مجاز می باشدe, as a result you may be enthusiastic to click on that link which by doing so, it will ask you to enter your personal information, which may include your bank card number, mobile phone number, address, etc., and if you provide them with this kind of information, in fact you are helping them hack your account and abuse your information, so we recommend you not to click on any mesغیر مجاز می باشدes that are suspicious, the thing that must be done is that you should ignore them, or you can even report them to Google, in order to block such mesغیر مجاز می باشدes, so that other people cannot see it and do not fall into the trap of hackers.

- Keystroke logging:
Hackers use keystroke logging, which means that the taps you make on your keyboard are being recorded, but you are not aware of that, as a result, the person who is running the login program can then recover all your information and use it, so many hackers access your account password and other information through keystroke logging and use it to their personal advantage.

- Guess the password:
Many users do not follow the tips which we have mentioned above which can help them set a secure password, as a result, hackers can easily guess the password and login to people's accounts in order to steal their information.

Last word:
In general, Google makes every effort to help users not to be hacked because security is one of the main factors which encourages users to use a search engine, it also tries to give the ability to keep their account in Google safe easily, in this article, we tried our best to provide you with useful information which help you a lot if you have trouble in keeping your account secure, as a result paying attention to the mentioned points can make you aware of the possible threats which can be prevented by enough acknowledgement.

Source:https://www.dotnek.com/Blog/Security/is-google-safe-from-hackers

Youtube:https://youtu.be/Ki7H9YPT2AE