development

Certainly none of the site owners want their site to be hacked , as a result, they try all the necessary strategies to secure the site, however, there are many online solutions for large and small site owners to secure their site as much as possible, and there are even experts who can help them maintain site security, a bit there is still hackers out there who try to websites in complex ways and steal and abuse all site information, more than half of the people can take back their site after it is hacked, but there are also people who cannot take back their account or website, and sometimes they are not even informed that their site has been hacked, in general, it can be said that no site is safe from hackers, even large sites are attacked by hackers, and you should be aware and think of the possibility that your site may be hacked at any time, so it is better to be familiar with the techniques that hackers use to hack your site, to maintain your site security with more awareness.

What does it mean to hack a site?
Hacking a site means that a person or even more than one person try to access your site through different ways and use your information to achieve their desires, in other words, a hack refers to a search to find security holes in a system and try to access your website or account through them.

Who is a hacker?
 Hackers are ordinary people like everybody, and they aren’t different from us, but we should note that hackers have high intelligence and mastery over the computer world, these people may be even hired by large companies to find security bugs on a site and report the bug to the company, so that they try to eliminate the bug as soon as possible, of course, it should be noted that not all hackers work in this direction, and most of them prefer the negative way which is trying their best to be able to access and infiltrate various sites and abuse the information of those sites for their desired results.

Hacker category:
1- Elite Hackers

2- White Hat Hackers

3- Black Hat Hackers

4- Gray Hat Hackers

5- Blue Hat Hackers

6- Pink Hat Hackers

7- Script Kiddies

8- Noob Hackers

9- Red Hat hackers

10- Hectoist

How to hack a website?
In all hacking methods used by different hackers, the goal is to find security holes and infiltrate the site through them, which we will mention some of these methods in the following.

- Brute-force attack:
In Brute-force attack , the hacker guesses a large number of passwords, one of which may eventually be correct, as a result he/she can access your information, so it is important to choose the right and secure password in order to increase the security of your website, and of course there are techniques you can use while choosing a password in order to prevent such an attack as much as possible.

- Security software is not up to date:
Another method used by hackers to hack a site is through the lack of up-to-date security software , to prevent this, make sure you have updated the security software or there is another way which you can add an option that gives you the possibility of updating these applications automatically.

- Infiltration through invalid software:
Hackers can infiltrate your site through malicious code that they enter the software, so you should never download the software you need from unreliable sources, it is better to check the programs you have downloaded now, and if you encounter anything suspicious, deactivate the program immediately, and you should also delete all the information about that program, because deactivating the program is not enough to avoid possible attacks.

- Social engineering:
Hackers may try to get access to your site and use your site information by trying a different way which can be a friendly one, for instance by abusing your trust in someone else, and try to email you via an email address which is slightly different from the email address of the person, but the difference is hard to be recognized, as a result you trust them, and you will give your personal information such as passwords, etc., to them whenever they want, as a result you fall into the trap of hackers, so you have to be sure to check the email address and pay more attention to this detail to make sure that it is correct.

- Infiltration of hackers through poor site structure:
The structure of the site has a great impact on the possibility of hacking by hackers, and if there are many holes in that, it gives them the opportunity of getting access to your website and your personal information.

If you don’t follow the tips in the site design which help you increase the security of the site, you may cause serious damages to your website, for example, when you allow all users to access the site admin page easily, in which case it can have negative impacts on your site.

- Access to confidential information for the public:
You may make a mistake while uploading information and do not do this process correctly, in which case the information that you intended to be available to only a limited number of people, will be available to many people, therefore hackers can easily use them for their desires, to resolve this issue, use URL removal tools to ensure that important URLs do not appear in Google search results, and check information that you intend to publish to the public and information that is only available to your employees regularly.

- DDoS Attacks:
People may not consider this attack as a hack, but it generally disrupts the site process, so you should be familiar with it, when a site is attacked by DDoS , it is visited more than usual and there are many fake requests for the site, in fact, in this type of attack, hackers get help from the botnet and eventually cause the server to be under a lot of pressure and disrupt the normal process of the site.

- Man in The Middle:
MITM is one of the types of attacks, in this kind of attack a hacker acts like a spy, which is more likely to occur when you are connected to a public Wi-Fi system, the hacker can interfere in every single request that you send to the server, through which other possibilities are provided for the hackers, here we are going to mention some of them in the following:

A hacker can easily change your destination and take you to a website that you never intended, this allows them to view your search history and access important information, or they can replace files that you have targeted and downloaded with other files or the ones that contain infected code, in general, in order not to be hacked in this way, it is better not to connect to public Wi-Fi if you have important information in your system, so that you can protect your information.

- KEYLOGGING:
One of the most used methods by hackers is KEYLOGGING , this method is such that by sending a program to your system, it is possible for the hacker to create a log of all the work that you do through the system or from they may take a picture of your screen which you won’t notice them at all, as a result they will access all your information such as site passwords, confidential information, etc., easily.

- PHISHING:
In this method, the hacker tries to create a site which is similar to the main site with the same address, this similarity is in a way that users do not realize that it is not the main site to which they have entered, so the hackers make the most of their information and can have access to your user account on the main site.

Last word:
The world of hackers is so complex, and you need to read a lot of books and articles to be aware of the possible threats, in this article we tried to mention the important points about hacking, categorization of hackers as well as the common methods that hackers use to hack your site, so that you can prevent your site from being hacked, but if you encounter a suspicious case, and you cannot find a solution to the problem by yourself, you should get help from experts.

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

As you know, the security of a site and the information it contains, as well as the security of the information of users which is entered the site by them, is of a great importance and all site owners try to create a safe and secure site in every step of designing a site.

Hypertext Transfer Protocol is one of the most common protocols that sites use to transfer information, but it does not provide high security for the site and the question comes to users’ mind is that whether such sites can be secure or not, or the things that can be done to secure the site, as well as thousands of other questions, some of which we will answer below. Hypertext Transfer Protocol Secure (HTTPS) is a protocol that is more secure than the HTTP protocol, and many browsers have declared that sites without HTTPS are not secure, so users who are looking for answers to their questions on the Internet would initially pay attention to the site address and if it doesn’t contain HTTPS, they do not prefer to use it in order to meet their needs, as a result they will look for another site that has high security, because if there is the need of entering their personal information to register on the site, they would prefer not to be worried about their loss of their information, due to the fact that if they choose an unsafe website there will be the possibility of being hacked and all of their information will be stolen.

If you are one of the people who have not used HTTPS yet, it is better to reconsider, and you will come to the conclusion by reading the rest of this article, that sites without this protocol cannot be safe.

The world of hacking has expanded these days, therefore there are lots of hackers who do researches and try to make progress in this field, so that they can easily hack your site and abuse your information, which is why you, as a web designer, must work to increase the security of your site, so that over time you can gain the trust of search engines and increase your site's ranking in the Google search results page, and ultimately many users will be attracted to your site because of its safety.

Can the site be secure without HTTPS?
According to the information we have given you so far, the answer to this question, is definitely no, HTTPS uses Secure Sockets Layer to encrypt all the data which should be transmitted between web servers and web browsers, thus the security increases and information such as user password will not be easily available to hackers.

If you want to reach a high level of site security without using the HTTPS protocol, you have to spend a lot of time and energy, but despite this effort it may not work, and you cannot create a secure site, the use of HTTPS has become very common there days and almost everyone uses this protocol and all the tips that are necessary to be implemented in order to increase the security of the site , as well as optimizing it, so they try their best to achieve a high ranking in Google search results, we will discuss this topic in more detail below.

Tips that make site owners not to design a site without HTTPS:
-” Unsecure website” warning:
From 2017, the Google Chrome web browser has started displaying “unsecured” alerts when a user entered important information on sites which didn’t contain the HTTPS protocol , in 2018, Google Chrome sent this mesغیر مجاز می باشدe after the user logged in to such sites and even when they were not entering their information yet, for this reason, users left such sites and preferred the secure sites to spend their time, which caused site owners not to think of designing a site without using the HTTPS protocol, and follow all the tips to convert their site from HTTP to HTTPS, in order to provide a positive user experience for users.

- HTTPS becomes a factor for site ranking:
As you know, the ranking of a site has a high impact on the success of site owners and there are many factors which are effective in ranking, one of these factors that are considered by search engines and its algorithms is HTTPS, the effect of this factor on the ranking of sites has been proven, and if you want to find out more about this topic, you can do some research, then you will see that all the sites that are shown on the first page of search results, start with an HTTPS URL which confirms the impact of this factor on website ranking.

-The lock icon next to HTTPS in the site address is considered as a sign of standard website:
As you know, sites that use HTTPS are becoming more and more popular among all users and site owners, and almost everyone uses such sites, this statistic shows that, nowadays, people pay more attention to everything and also give great importance to the security of their information, when users see the lock icon, they will come to the conclusion that this site has taken care of the users and has observed the necessary points, so they click on such sites, for example, if you intend to shop online and search for a site that is valid, when there is this lock next to the site address, you will conclude that you have selected the correct site and all your information, such as, bank card number, address, etc., is going to be safe, so you will also recommend the site to others.

In general, the reasons why you should choose the HTTPS protocol:
- You may have just set up a site, and you have a limited budget at the beginning of the way, if this site security is of special importance to you, and you want to achieve a high level of security for your site, despite the low budget, HTTPS can help you, because Hypertext Transfer Protocol Secure is now for free, and you can use it easily.

- This protocol attracts the trust of users and as we mentioned before, users get a good experience from such sites.

- With the development of this protocol, the speed of the site increases because of using this protocol, and as you know, the speed of the site is an important factor for users, due to the fact that they can get the answers to their questions through fast websites.

- One of the factors that can affect the security of the site and provide the site information to hackers, is the use of public Wi-Fi which will provide a security hole which can be attacked by hackers, at this time, using HTTPS will help you to increase the security of the site while using public Wi-Fi.

- As mentioned before, the use of this protocol is effective in ranking.

All these reasons have caused users and site owners not to choose sites without HTTPS at all.

Important points:
While using HTTPS as a web designer to increase the security of your site, you should keep in mind that site security is very complex and in addition to use this for site security, you should also consider other points in order to be able to create a secure site that protects your information as well as the information entered your website by users, and is not accessible to hackers.

To achieve high security, in addition to using HTTPS, you should pay attention to the following points.

- Pay attention to DDOS attacks and take care of your site by raising your awareness in this field.

- Download your software from reputable sources and update all software regularly, because if you do not follow these tips, your site will be easily hacked and using the HTTPS protocol cannot help you in this case.

- There is a possibility of a POODLE attack due to the vulnerability of one of the updated SSLs, through which the hacker can access the transmitted information.

- BEAST attack, which is caused by SSL vulnerability as in the previous case, the hacker decrypts the traffic between the parts and accesses the information.

Last word:
In general, sites that do not use HTTPS are considered as secure sites and users do not trust them, therefore, site designers always use this protocol and pay attention to the fact that in addition to using this protocol, other points should be taken into consideration to increase the security of the site.

Source:https://www.dotnek.com/Blog/Security/can-the-site-be-secure-without-https

As you know, site security is so critical, and all site owners try to protect their site and information from being hacked by hackers, for this reason, everyone searches for updated news related to site security to make their site more secure day by day, due to the importance of site security, many questions come to the minds of users regarding site security, one of which is related to HTTPS , which we will discuss in this article, but before that it is necessary to HTTP get acquainted with HTTPS.

What is HTTP?
Hypertext Transfer Protocol is one of the most common protocols used to transfer information between web servers and web browsers that uses codes for this transfer which all of them are visible, which decreases the security of using this protocol by site owners, however, despite the low security of using this protocol, most sites prefer this protocol and try to use HTTPS, and increase the security of the site as much as possible.

Then, What is HTTPS?
Hypertext Transfer Protocol Secure is a protocol that, as its suffix implies, is more secure than HTTP, this protocol uses the Secure Sockets Layer to encrypt all the data that is to be transmitted between web servers and web browsers, thus the security increases greatly.

HTTP or HTTPS?
As we mentioned, HTTPS can provide you with more security, and today everyone is looking for this property, also site owners may suggest each other to use HTTPS, and in addition, Google search engine pays more attention to sites that use the protocol, and give a higher ranking to them compared to sites that do not use the HTTPS protocol, which is why many site designers prefer this one, it should be noted that, as you know, the factors that Google's algorithms used to rank sites are unknown, and it has been seen that many sites have not made significant improvements in rankings despite the fact that they are using HTTPS.

In general, using this protocol increases the security of the site , so it is a good reason for people to use it, because high security of a website, causes the attraction of users, as a result this website will attract more attention among competitors, so it ultimately gets a better ranking by doing other site optimization techniques correctly and in principle.

Advantages of using HTTPS protocol:
- Optimize the site and increase the site ranking in the Google search results page

- Increase site security

- Create a positive user experience for the user

- Do not show transfer codes and encrypt them

- Increase the speed of site indexing

- .....

In addition to the benefits that we have mentioned above, this protocol has other benefits, all of which encourage site designers to use this protocol, so it is better to know the way that you can convert your site from HTTP to HTTPS.

Steps to convert website from HTTP to HTTPS:
To convert a site from HTTP to HTTPS, you must first obtain an SSL certificate and then configure your host with an SSL certificate, after these two steps, it is time to convert all internal and external links as well as 301 redirects from HTTP to HTTPS, in the last step, you need to do the necessary update in the content distribution network, and add a new version of your site to Google Search Console and Google Analytic , but the main question that we are going to answer in this article is whether HTTPS can be hacked or not, which we will answer in the following.

Can HTTPS be hacked?
Although HTTPS increases the security of the site , this does not mean that hackers cannot hack it, even after switching HTTP to HTTPS, your site may be attacked by hackers, so in addition to be safe your website in this way, you need to pay attention to other points to be able to turn your site into a secure site.

To answer the question about the possibility of HTTPS to be hacked, we should pay attention to another point, as we have already told you, in the first step of using this protocol, you need to provide an SSL certificate, which is a certificate that increases the security of the site, so if hackers can hack SSL certificate, they can also hack HTTP , which we will discuss more about SSL in the following.

What is SSL?
Secure Socket Layer is for establishing secure communication between the server and the user on the Internet, in fact, this protocol is generally used to increase the security of sites that are using unsafe protocols, SSL causes the data that is going be transmitted to be encrypted, so that it is not abused by hackers during the transfer, in other words, when an attack occurs, such as Man in The Middle, it protects your site information and prevents your information from being hacked, but it does not protect the data stored on the server and, so in order to protect other sections, other existing security holes must be filled.

Tips that can be observed in addition to using SSL to increase site security:
- Keep your site software up to date.

- Pay more attention to server configuration.

- Be careful in choosing the password.

It is also necessary to take other steps that should be considered in creating site security, so that a site can have good security and users can safely put their information in the site.

Can we trust any website that has HTTPS in its URL?
The answer to this question is definitely no, a site that has HTTPS in its address can secure the information that is being transmitted, but it cannot determine the main purpose of the site you are using, so in choosing a site, in addition to the site address, other points should be considered to protect your information from being abused.

In other words, SSL certificates cannot confirm the reliability of the site, because today these certificates are available to everyone and can be gained at a low price or even for free, so to find out whether a site is secure and you can get the answers to the questions or not, you should look at the site ranking, because search engine algorithms, consider many factors to rank the site, and as you know, the purpose of search engines, is to gain user satisfaction, so you can trust sites that have high ranking.

Important note:
Any site that has SSL should not be trusted, because, nowadays, hackers know that if their site address contains HTTPS, they can easily attract users, for instance they try to get your attention to their site by sending mesغیر مجاز می باشدes via an address containing HTTPS, and when you click on the site address, you will enter the site, as a result, they will have full access to all the information, so it is necessary to pay attention to other points and take careful steps to keep your information safe.

Last word:
Site security is very important and to achieve more security, people turn to different strategies, one of which is the use of HTTPS, which we tried to mention the fact that even the most secure protocols may not be able to maintain the security of the site completely, and if you want a secure site, you must follow all the tips at the same time, so that if there is fewer security holes in your site, hackers will not be able to access your information, and even if they hack your website through those few security holes, they can access to less information, as a result it is better not to just focus on the site address and try to prioritize other options for making a website secure because it will work more, so you are able to protect your information from hackers, due to the fact that if they access your information, they will abuse them, and it will make trouble for you, in this article we also tried to mention some of the tips that can be done in addition to HTTP and HTTPS to make your website secure, if you pay attention to all points mentioned above, you can be safe from attacks.

Source:https://www.dotnek.com/Blog/Security/can-https-be-hacked

Youtube:https://youtu.be/OfmTnlCblgU

Android:
Android is a platform and operating system used and supported by Xamarin.Forms. Android is a platform that can be used to output and design and develop a variety of applications using Xamarin.Forms.

All versions of the Android operating system can be used for output, but with the advancement of technology, versions 5 and above are supported by Xamarin.Forms . In order for the Android operating system to be supported by Xamarin.Forms, we must have the latest versions of Android SDK Tools and Android API platform installed. In building and developing applications for Android projects, the target / compile versions must be set to Use latest installed platform. The lowest version can be API 19, which can easily support devices with Android 5.5 operating system.

iOS:
iOS is the operating system used to build and run a variety of applications. Version 9 and above Version 9 of this operating system is a suitable version for producing and running all kinds of applications .

Windows:
Another platform and operating system that is suitable for running applications produced by Xamarin.Forms , is the Windows operating system. Xamarin.Forms also supports the Windows operating system and can also output to this operating system.

What platforms are supported in Xamarin.Forms?
Applications written using Xamarin.Forms for Android, iOS and Windows operating systems can be launched in the following versions:

- Version 9 or higher for iOS
- Android version 5.5 (API 21) or higher for Android operating system. Of course, it should be noted that this version is the minimum and most basic version to run and launch applications written in Xamarin.Forms.
- Windows 10 Universal Platform version for Windows operating system to launch applications built into Xamarin.Forms

All applications built in Xamarin.Forms are for Android, iOS and Windows operating systems and platforms, but to be able to run and run all of them on these platforms, it is necessary that their versions are in accordance with the versions listed in the section. Be high. Because applications designed using Xamarin.Forms support some platforms and have the ability to run on them.

Of course, to design and develop applications with iOS, you need a Mac system connected to the Internet. The latest and highest version required for the Mac system to design and develop iOS applications is the Xcode version and the lowest and lowest version required to do so is the maغیر مجاز می باشد version. Design, coding and development of different types of applications on different types of platforms and versions are done using Visual Studio.

Version 9 or higher for iOS:
The ninth version of iOS does not have many changes in appearance, but in terms of functionality, it offers many changes and capabilities that users of this operating system have been looking for. Smart features and more powerful spotlight search, new capabilities to control the battery and increase the battery power saving time, adding several default and required applications and applications, etc. are some of the features that are in the ninth version of the iOS operating system. Provided. The addition of these features has enabled Xamarin.Forms to support this version of the operating system, as well as applications designed by Xamarin.Forms can be launched and run in this version of the operating system.

Android 5.5 (API 21):
This version of Android is known as Android Lollipop and is more commonly seen as Android L. This version of the Android operating system has changes and updates to the appearance and structure. The APIs in this version of the operating system allow programmers and application developers to build and develop professional and attractive applications and programs. This version of the Android operating system is suitable for running designed applications and is also supported by Xamarin.Forms, so a suitable version for designing different types of applications by Xamarin.Forms

Windows 10 Universal Platform:
is a technology that is used for all devices with Windows 10 operating system, devices such as PCs, phones, tablets, Xboxes , etc. In this technology, the programmer at once Coding and programming can take different outputs for x86 and x64 processors. The benefits of this version of the Windows operating system are programming based on the device family, not the operating system. In this way, written applications recognize the APIs, behaviors, and modes of the device and can act on the recognition they have made. This version of the Windows operating system is supported by Xamarin.Forms and applications designed by Xamarin.Forms can be easily launched and run in this version of the Windows operating system.

Other platforms and operating systems supported by Xamarin.Forms are as follows:
- Samsung Tizen
- mac OS 10.13 or higher
- GTK
- #WPF

Samsung Tizen:
This operating system is for Samsung, which was introduced in 2012, but it is used on a trial basis, and phones with this operating system have not entered the market. But some smart devices such as Samsung gear2 watch use this operating system and have this operating system. This is an open source operating system, which means that it can be modified and developed for free by many developers around the world. The open source nature of this operating system is an advantage that allows it to be developed for free by skilled developers around the world and made available to users. The user interface of this operating system is almost similar to the Android environment, but compared to Android, it works better than Android in increasing battery life or increasing battery power storage time. Applications designed for this operating system are built on the web. The web-based applications of this system allow applications to work in any environment. Of course, in addition to HTML5, Xamarin.Forms is also used to design, build and develop applications for this operating system. Of course, it should be noted that Tizen operating system is based on the Linux kernel and is not specific to mobile phones and can be used for all smart devices that need the operating system. Smart devices such as refrigerators, washing machines, cars, TVs, wearable gadgets, smart watches, etc. Different types of smart devices that need an operating system for their operation.

maغیر مجاز می باشد 10.13 or higher:
is the latest version provided by Apple, which has made the necessary changes and updates to this version of the operating system and has provided it for the convenience and satisfaction of its users. Another name for this version is maغیر مجاز می باشد High Sierra, which is the fourteenth updated version by Apple. The hardware requirements for this version of the operating system are similar to the hardware requirements for maغیر مجاز می باشد 10.12. This version of Mac OS is supported by Xamarin.Forms and can be used in various cases. Apple has provided some interesting features in this version of the operating system.

Among the interesting features of this version of the operating system are the following:
- It is possible to search Powerful Spotlight in mails in this version of the operating system, and users can search among their mails in the form of Powerful Spotlight.
- Safari blocks all ads, auto-play videos, and all sorts of annoying things.There are more advanced features in the photos program for editing photos, and users can easily use this feature using this version of the operating system and edit their images in an advanced and easy way.Can also support external and external graphics cards.

GTK #:
A library built using the C programming language to provide high quality and fast tools for user interface design. This library contains tools that are used to design a variety of user interfaces in C and can be used under other languages ​​such as C ++ or python. One of the features of this library is that it is multi-platform and can easily be used in other environments and platforms. Xamarin.Forms also supports this library and can be used to build and develop multi-platform applications.

Windows Presentation Foundation:
WPF, which is used to design graphical interfaces. Without graphical interfaces, it was possible to build and design all kinds of applications and software using coding, but with graphical interfaces, the process of making and developing has become easier because there is no need for much coding. WPF is based on DirectX. The latest Microsoft technology to design a variety of graphical interfaces for the convenience of users and developers, is a platform supported by Xamarin.Forms and can be used to build and develop a variety of applications.

What platforms are not supported by Xamarin.Forms?
There are also some platforms that are obsolete and not supported by Xamarin.Forms. These types of platforms are as follows:

- Windows 8.1 / Windows Phone 8.1 WinRT
- Windows Phone 8 Silverlight

Why are these platforms obsolete and not supported by Xamarin.Forms?
- Windows Phone and Android are both designed and built for the same purpose and task, but they have differences that make Android superior to Windows Phone, which is why Xamarin.Forms chooses the Android platform for support. And does not support the Windows Phone platform.
- In Android, widgets and applications are located in a home screen that allows more regular and easy access to applications, and most importantly in Android, users can change their layout at will. In Windows Phone, all programs are tiled. Android is more flexible in terms of personalization than Windows Phone, which is why Android is superior to Windows Phone and has been supported by Xamarin.Forms.
- The contacts and contacts section in Android is in the same application and next to each other, and this makes the call process easier, but in Windows Phone, the contacts and contacts section are not next to each other, which is one of the reasons why Android is superior to Windows Phone. And be selected for support by Xamarin.Forms.

Source:https://www.dotnek.com/Blog/Apps/what-are-supported-platforms-in-xamarinforms

In this tutorial you will learn:
- How to store data in the local Xamarin database ?

- How to use a NuGet Package Manager to add a NuGet Package?

Note: In order to be able to do this project, you must have already successfully completed the project of building multi-page applications .

How to use local storage in Xamarin Forms using Visual Studio?
1- Open Visual Studio
2- Open the Notes solution project.
3- In the Solution Explorer section, select the Notes project and right-click on it.
4- After right-clicking on the project, select Manage NuGet Packages.
5- In the NuGet Package Manager section, select the Browser tab to search.
6- Search for the SQLite-net-plc. package in NuGet , and after finding it, click Install to add it to the project.

Note:
There are packages with similar names, the package you should choose has the following specifications:

- Author (s): Frank A. Krueger
- Id: SQLite-net-plc.
- NuGet link: SQLite-net-plc.

- Open the Models folder in the Solution Explorer section of the Note.cs project and delete the existing code and enter the following code there.

using System;
using SQLite;

namespace Notes. Models
{
public class Note
{
[PrimaryKey, AutoIncrement]
public int ID {get; set;}
public string Text {get; set;}
public DateTime Date {get; set;}
}
}

These codes define the Note model, which is used to store note data in applications .

Each note in the SQLite.NET database has its own unique id, in fact the ID, PrimeryKey, and AutoIncrement attributes make each note have its own id.

1- Record the changes made and exit that window.
2- Create a folder called Data in the Solution Explorer section and add it to the Notes project.
3- In the folder created in the Notes project and in the Solution Explorer section, create a class called NoteDatabase.
4- In the created NoteDatabase.cs class, delete all existing codes and replace the following codes.

using System.Collections. Generic;
using System.Threading. Tasks;
using SQLite;
using Notes.Models;

namespace Notes.Data
{
public class NoteDatabase
{
readonly SQLiteAsyncConnection _database;
public NoteDatabase (dbPath string)
{
_database = new SQLiteAsyncConnection (dbPath);
_database. CreateTableAsync (). Wait ();
}

public Task > GetNotesAsync ()
{
return _database. Table (). ToListAsync ();
}

public Task GetNoteAsync (int id)
{
return _database. Table ()
. Where (i => i.ID == id)
. FirstOrDefaultAsync ();
}

public Task SaveNoteAsync (Note note)
{
if (note.ID! = 0)
{
return _database. UpdateAsync (note);
}
else
{
return _database. InsertAsync (note);
}
}

public Task DeleteNoteAsync (Note note)
{
return _database. DeleteAsync (note);
}
}
}

The code written in this class is used to create a database, read data, write and add data and delete it.

Constructor This class receives the address of the file in which the database was created and stored as an argument. The address of the file in which the database was created and stored is provided by the App class. Asynchronous SQLite.NET APIs in these classes are used to transfer database calculations to the background thread.

- Click on the App.xaml.cs section in the Solution Explorer of the Notes project and replace the code in the file with the code below.

using System;
using System.IO;
using Xamarin.Forms;
using Notes.Data;

namespace Notes
{
public partial class App: Application
{
static NoteDatabase database;
public static NoteDatabase Database
{
get
{
if (database == null)
{
database = new NoteDatabase (Path.Combine (Environment.GetFolderPath (Environment.SpecialFolder. LocalApplicationData), "Notes.db3"));
}
return database;
}
}

public App ()
{
InitializeComponent ();
MainPage = new NavigationPage (new NotesPage ());
}

protected override void OnStart ()
{
// Handle when your app starts
}

protected override void OnSleep ()
{
// Handle when your app sleeps
}

protected override void OnResume ()
{
// Handle when your app resumes
}
}
}

By entering this code, you create a database that creates a NoteDatabase instance as a singleton and also receives its filename as an argument and sends it to the NoteDatabase constructor. Creating a database as a singleton has the advantage that only one connection is created and used to communicate with the database with the same connection.

- Save the changes made and exit that window.

- Click on the NotePage.xaml.cs section in the Solution Explorer of the Notes project and replace the code listed below with the OnAppearing method with the code inside the file.

protected override async void OnAppearing ()
{
base. OnAppearing ();
listView.ItemsSource = await App.Database. GetNotesAsync ();
}

By entering this code, you will collect the notes stored in the database. In other words, this code collects all the notes stored in the database.

- Save the changes you made and exit that window.
- Click on NoteEntryPage.xaml.cs in the Solution Explorer section and enter the following code inside it:

async void OnSaveButtonClicked (object sender, EventArgs e)
{
var note = (Note) BindingContext;
note. Date = DateTime.UtcNow;
await App.Database. SaveNoteAsync (note);
await Navigation.PopAsync ();
}

async void OnDeleteButtonClicked (object sender, EventArgs e)
{
var note = (Note) BindingContext;
await App.Database. DeleteNoteAsync (note);
await Navigation.PopAsync ();
}

NoteEntryPage maintains an instance of a Note.

When the OnSaveButtonClicked method is executed, the Note instance is stored in the database and the application returns to the previous page.

When the OnDeleteButtonClicked method is executed, the Note instance is removed from the database and the application returns to the previous page.

How to use sqllite.net as a local storage in Xamarin Form using Visual Studio for Mac?
1- Open Visual Studio
2- Open the Notes solution project.
3- In the Solution Pad section, select the Notes project and right-click on it.
4- After right-clicking on the project, select Add> Add NuGet Packages.
5- In the NuGet Package Manager section, select the Browser tab to search.
6- And search for NuGet SQLite-net-plc. and after finding it, click Add Package to add to the project.

Note:
There are packages with similar names, the package you should choose has the following specifications:

- Author (s): Frank A. Krueger
- Id: SQLite-net-plc.
- NuGet link: SQLite-net-plc.

- Open the Models folder in the Solution Pad section of the Note.cs project and delete the existing code and enter the following code there.

using System;

using SQLite;

namespace Notes.Models

{

public class Note

{

[PrimaryKey, AutoIncrement]

public int ID {get; set;}

public string Text {get; set; }

public DateTime Date {get; set;}

}

}

These codes define the Note model, which is used to store note data in applications.

Each note in the SQLite.NET database has its own unique id, in fact the ID, PrimeryKey, and AutoIncrement attributes make each note have its own id.

- Record the changes made and exit that window.
- Create a folder called Data in the Solution Pad and add it to the Notes project.
- In the folder created in the Notes project and in the Solution Pad section, create a class called NoteDatabase.
- In the created NoteDatabase.cs class, delete all existing codes and replace the following codes.

using System.Collections. Generic;
using System.Threading. Tasks;
using SQLite;
using Notes.Models;
namespace Notes.Data
{
public class NoteDatabase
{
readonly SQLiteAsyncConnection _database;
public NoteDatabase (dbPath string)
{
_database = new SQLiteAsyncConnection (dbPath);
_database. CreateTableAsync (). Wait ();
}

public Task > GetNotesAsync ()
{
return _database. Table (). ToListAsync (async (Note note)
{
return _database. DeleteAsync (note);
}

}

}

The code written in this class is used to create a database, read data, write and add data and delete it.

Constructor This class receives the address of the file in which the database was created and stored as an argument. The address of the file in which the database was created and stored is provided by the App class. Asynchronous SQLite.NET APIs in these classes are used to transfer database calculations to the background thread.

- Click on the App.xaml.cs section in the Solution Pad of the Notes project and replace the code inserted in the file below with the code inside it.

using System;
using System.IO;
using Xamarin.Forms;
using Notes.Data;

namespace Notes
{
public partial class App: Application
{
static NoteDatabase database;
public static NoteDatabase Database
{
get
{
if (database == null)
{
database = new NoteDatabase (Path.Combine (Environment.GetFolderPath (Environment.SpecialFolder. LocalApplicationData), "Notes.db3"));
}
return database;
}
}
public App ()
{
InitializeComponent ();
MainPage = new NavigationPage (new NotesPage ());
}

protected override void OnStart ()
{
// Handle when your app starts
}

protected override void OnSleep ()
{
// Handle when your app sleeps
}

protected override void OnResume ()
{
// Handle when your app resumes
}
}
}

By entering this code, you create a database that creates a NoteDatabase instance as a singleton and also receives its filename as an argument and sends it to the NoteDatabase constructor. Creating a database as a singleton has the advantage that only one connection is created and used to communicate with the database with the same connection.

- Save the changes made and exit that window.
- Click on the NotePage.xaml.cs section in the Solution Pad of the Notes project and replace the code listed below with the OnAppearing method with the code inside the file.

protected override async void OnAppearing ()
{
base. OnAppearing ();
listView.ItemsSource = await App.Database. GetNotesAsync ();
}

By inserting this piece of code, you will collect the notes stored in the database. In other words, this code collects all the notes stored in the database.

- Save the changes you made and exit that window.
- Click on NoteEntryPage.xaml.cs in the Solution Pad and enter the following code inside:

async void OnSaveButtonClicked (object sender, EventArgs e)
{
var note = (Note) BindingContext;
note. Date = DateTime.UtcNow;
await App.Database. SaveNoteAsync (note);
await Navigation.PopAsync ();

}

async void OnDeleteButtonClicked (object sender, EventArgs e)
{
var note = (Note) BindingContext;
await App.Database. DeleteNoteAsync (note);
await Navigation.PopAsync ();
}

NoteEntryPage maintains an instance of a Note.

When the OnSaveButtonClicked method is executed, the Note instance is stored in the database and the application returns to the previous page.

 Source:https://www.dotnek.com/Blog/Apps/how-to-store-data-in-a-local-sqlitenet-databa

To install Xamarin on different types of old and new versions of Visual Studio, which is free and does not require any additional and separate permissions, you can use the Visual Studio installer tool, which simplifies the process of installing Xamarin on Visual Studio.

What technologies do we need to install Xamarin on Visual Studio?
Here are the requirements to install Xamarin on Visual Studio :

1- Windows operating system with version 7 or higher
2- Visual Studio software with version 2015 or 2017 or higher (Enterprise, Professional or Community)
3- Xamarin file for installation on Visual Studio

Note:
If you are using the Visual Studio Express version , Xamarin may not be compatible with that version of Visual Studio because some plugins are not supported.

Steps to install Xamarin on Visual Studio:
To build applications with Xamarin with programming in Visual Studio with C # programming language, Xamarin must be installed as part of Visual Studio so that it can be easily accessed and programmed.

1- In the first step, if you do not have Visual Studio installed, you must download and install it from the main and valid Visual Studio homepage. Download versions depend on your wishes. Download Visual Studio Community, Visual Studio Professional or Visual Studio Enterprise. Visual Studio download https://visualstudio.microsoft.com/downloads/
2- After downloading the Visual Studio file, select and download the downloaded package option to install it.
3- Next, the Mobile development with .NET option will appear on the installation page, select it and click on it.
4- After clicking the Mobile development with .NET option, pay attention to the Summary section on the right, and in this section, all the items that are installed with Visual Studio are displayed. Items such as Xamarin Profiler, Xamarin Workbooks, Java SE Development Kit , Android NDK, Android Emulator ... will be installed with Visual Studio.
5- After reviewing and preparing other items, click on the install option to finally install Visual Studio on your system. The time it takes to prepare and install Visual Studio depends on the version. This means that depending on the type of Visual Studio you have chosen to install, the preparation and installation process will take some time.
6- After completing the Visual Studio installation process, click the Launch option to set up and prepare Visual Studio.

Now that Visual Studio is installed on your system, to build mobile applications on different types of platforms, it is time to install and launch Xamarin in Visual Studio. After installing Visual Studio, Xamarin should be installed for programming and building applications.

How to add Xamarin to Visual Studio 2015?
To add Xamarin to Visual Studio 2015 on Windows, you must follow these steps:

1- Click on Windows Start, then select Windows Start to continue the process.
2- In the Windows Start section, right-click on the Microsoft Visual Studio option and select Change.

3- After selecting the Change option, the Visual Studio Installer window will appear, select the Modify button in this window.

4- In the Features section, scroll down to reach the Cross Platform Mobile Development section. In this section, you can select the Xamarin option with your preferred version of C # / .NET (Xamarin).

5- To add Xamarin to Visual Studio, you must select the desired version of Xamarin and then click the UPDATE option.

If you follow these steps in order and carefully, you can install Xamarin in Visual Studio version 2015 and then start programming and building the application .

How to ensure the correct installation of Xamarin in Visual Studio?
To confirm the installation steps of Xamarin on Visual Studio, it is better to pay attention to the following:

Confirmation of Xamarin installation in the 2017 version of Visual Studio:
1- Launch Visual Studio 2017.
2- At the top of the toolbar, click Help.
3- In this section, if Xamarin is installed and set up correctly, an additional option called Xamarin will appear in this section. This means confirming the installation of Xamarin in Visual Studio 2017 by adding the Xamarin option in the Help section of Visual Studio.

Confirm Xamarin installation in other versions of Visual Studio:
1- Launch Visual Studio with any version.
2- At the top of the toolbar, click Help.
3- In the Help section, click the last option, which is the About Microsoft Visual Studio option.
4- If in this section, among the installed lists, there is also a Xamarin installation list, it means that the Xamarin installation process has been done correctly and is ready for programming.

What is Xamarin.Forms?
Xamarin.Forms is actually the user interface or UI that was designed and created for the convenience of application developers. Application developers using Xamarin.Forms can easily program in Visual Studio with C # programming language on several platforms of Android, iOS and Windows Phone and develop native applications. The APIs in Xamarin.Forms can be used to design and build different types of native applications on various platforms such as Android , iOS and even Windows.

Techniques for creating a UI in Xamarin.Forms:
1- Creating a UI in the source code using the APIs provided by Xamarin.Forms itself.
2- Using XAML scalable markup language software, which was designed by Microsoft itself as a markup language, for UI design

In the second method to create the UI, the code related to creating the user interface is stored in an XAML file in XAML format, but its behavior at runtime is stored separately in a code-behind file.

Methods of designing and building native applications using Xamarin in Visual Studio:
There are two ways to design and build native and multi-platform applications using Visual Studio:

- Forms technology:
In this method, a user interface is designed visually, which is used to design applications , and by using this user interface, minor changes can be made in the common code between platforms. It should be noted that UI codes and backend codes are common to all platforms.
- Xamarin native:
In this method, using Xamarin. Windows, Xamarin.Android and Xamarin. iOS libraries, you can code and build an application for each of the platforms separately.

Note:
In using Xamarin form, the codes written in all platforms are shared and only by applying a small change in them, different outputs can be obtained simultaneously and using common codes.

What can the Xamarin.Forms platform be used for?
To design applications where shared source code is more important than its user interface.Do not need the capabilities of special platforms to design applications.To design applications that are used to enter data and information.Also used for easy designs using XAML.For sharing UI design templatesTo create and design several native applications by sharing the written code of C # programming language, on different platforms of Android, iOS and Windows

How to run the program in Xamarin Form?
How to run the program in Xamarin Form is that all pages and controls are related to the native user interface on their own platform. This means that running the app on the Android platform is different from iOS, although they have the same code. Xamarin Form will appear on the iOS platform as UITextView, on the Android platform as EditText and on Windows as Textbox.

What is the difference between Xamarin Form and Xamarin?
One of the misconceptions that most people have is that they think Xamarin is the same as Xamarin form, but in fact they are very different from each other and even their functions are different. One of the important differences is that using Xamarin can be programmed separately for each of the Android and iOS platforms, but in using Xamarin form, different outputs of the platform can be programmed and programmed at the same time. Various Android and iOS. In using Xamarin to build native applications on different platforms, separate coding must be done and it is not possible to share the code in Xamarin.Forms, but by sharing the code in Xamarin, the form can be coded only once and took various outputs simultaneously.

Why use Xamarin.Forms to design and build native applications?
1- The programming language for building and designing all native applications on all platforms is C #, and for outputs on various platforms, there is no need to re-code.
2- The basis of all platforms are equal and with just a little change of code and sharing them, different outputs can be obtained in different platforms.
3- Xamarin.Forms has access to all .Net libraries, and in programming with Xamarin, you cannot access the .NET library.
4- It is easier to manage and maintain applications designed using Xamarin.Forms, because when you want to update the application or make changes to it, you have to change the source code. Because the code in the source is very close to the code of different platforms, it is easier to maintain and manage them.
5- Xamarin.Forms can also be used effectively to test a variety of applications designed on all platforms. In this case, Xamarin.Forms provides some tools for developers to use them to test the application on real mobile devices and solve their problems.

Source:https://www.dotnek.com/Blog/Apps/getting-started-with-xamarinforms-and-how-to

Protecting the important information that exists in computer systems has become a very important issue today, and many people are trying to harm the security of information in different ways, as well as using the information contained in other people's computers in order to achieve their desired results, as you know, there are profiteers who use different factors to achieve their desires, one of which is the use of malwares, which we will look at different types of it, as well as ways to protect information against them.

What is Malware?
 In fact, malware is a type of code that will ultimately disrupt your information security system and allow profiteers to gain access to other people's information through different devices, once a system is infected with malware, different things may happen to that, for example spam emails may be sent by the infected system or all passwords may be stolen as well as other things that may happen.

In general, security holes have the worst effect because if they exist, different types of malware can penetrate the system.

- Adware:
This type of Malware is a program that users do not want to see, but are displayed to the user without their consent.

So far you are familiar with a number of Malwares, and it is time to get acquainted with the ways in which you can protect your system and your information against these Malwares, here are some of these ways.

The ways to protect yourself from these malwares:
There are many reports of phone scams today, in which people call users with malicious intent and offer to help protect their system against malwares, but in fact they have other purposes of contacting you and their ultimate goal is to infect the system.

These people may also ask you to pay them in order to protect your system, and once you do so, they won’t protect your information, and they may introduce viruses into your system themselves to eventually infect your system, in general, the following ways can help you in this way:

- keep all the software in your system up to date:
When software is created by designers, it may have bugs that, once released, manufacturers will check for bugs in that software after each update to fix any security holes, according to the points which have mentioned, one of the ways in which you can protect the system from malware, is to constantly update the software in the system, so that you can greatly increase system security .

- Do not miss the pop-up windows:
Such windows open spontaneously without clicking on anything, and may cause the viruses to enter your system if you click on them, so you should be careful while working with the Internet, so you have to be careful not to click on anything at all and get out of them quickly if you encounter such cases, nowadays, it is also the possibility of using a pop-up blocker to prevent the future dangerous events from happening, as a result you can reduce possible problems.

- Be careful while opening suspicious emails:
One of the methods that hackers use to log in to users' systems, is to send spam emails that eventually infect them, spam emails often have an attractive appearance and attract users to click on them which will eventually cause them to fall into the trap of hackers as a result the information of the system will be stolen, so you should always be careful while working with the system and never open such emails to avoid the bad consequences.

- Disable auto-update:
Most systems have automatic updates, and these same updates may cause a harmful software to be downloaded which can damage the system.

- Use a firewall:
Search for “check firewall” in the Start Menu and click on “check firewall status” among the displayed results, this feature protects your system from unwanted Internet threats, you have to check whether the firewall is active or inactive constantly, and activate it quickly if it is inactive in order to increase the security of your system .

- Be careful in choosing the password:
Password is of a great importance in increasing the security of the system and if you try to choose an easy one, or the one which is not chosen correctly, it can cause a lot of damage to the system, some people use their name, their child's name, year of birth and family members, etc., as a password, all of which can be easily detected by hackers, so that they can easily log in and have access to your information in order to abuse them and achieve their desired results.

If a password contains at least 8 characters and uses a combination of uppercase and lowercase letters as well as numbers and other characters, it can be considered as a suitable one, so that it takes a long time to guess, or it is generally impossible to guess.

- Back up all your data:
In general, to protect the security of the site against any threat, you should always follow the tips that can increase the security of the site, the same is true for malwares, in order to do so, you should make a back-up of your data, especially the important one, so that you can access your data if something happens to it.

If you have not backed up your data yet, it is time to make a back-up of it quickly, so that you can make sure that your data will be protected.

- Install the appropriate antivirus:
One of the things that can protect the information in your system against various types of malware is the installation of a suitable and strong antivirus, there are many antivirus programs that can be used for free to increase the security of the site which block the entry of viruses to user’s systems, so it is necessary for every user to install a perfect one.

Last word:
In general, improving the security of the site against infection by malwares is very important and one of the main causes of users’ concerns is to protect their information and system against such infections, in this article, a number of types of malwares as well as the ways that people can use to protect them against such infections have been mentioned, so that you can use them to increase the security of your system as much as possible, as a result if you pay attention to the mentioned points, you can find the solutions of protecting your system from malwares because they can damage your system as much as possible, and you may have no solution after being attacked by malwares, so it is better to prevent the possible damages from happening.

Source:https://www.dotnek.com/Blog/Security/the-ways-to-protect-yourself-from-these-malwa

Youtube:https://youtu.be/zvOfuUFMqVc

User experience is another thing that has a positive effect on SEO. In this article, we will talk about what user experience is and what effect it has on SEO and site.

What is the user experience?
User experience is actually the amount of users' satisfaction with the overall structure of the site, in the sense that the more users are satisfied with the appearance and technical structure of the site, the better effects it will have on the site's SEO . All the activities and actions that we do on our site, whether technically or visually, are more user-friendly, will increase the traffic and visits to our site to the same extent. That is, user experience is directly related to traffic and site visits, and with increasing satisfaction and user experience, traffic and site visits also increase.

The factors that affect the user experience are as follows:
- Up-to-date content
- Beautiful and user-friendly design - True internal links
- True external link building and professional backlinks - Complete content
- Content length
- Banner ads, pop-ups and ...
- Existence and use of multimedia
- Responsive design and optimization for display on mobile phones
- High site loading speed
- Simple design and convenient user guide to access the required items

Why do we need user experience?
Ux in other words, is the research that is done to identify the personality, tastes, needs and goals of users. That is, all the functions and behaviors of users are considered in order to find and create a simple way to communicate better and deeper with users. In designing the user experience, the Ux designer must have sufficient knowledge of his target users and audiences to be able to identify their needs in order to provide and meet their needs according to their wishes and desires. Therefore, the duty and responsibility of the Ux designer in the first stage is to identify the user's needs and try to meet his needs according to his wishes.

So Ux is one of the things that greatly affects the SEO of the site and improves the performance of the site. The reason is that Google search engine pays a lot of attention to user response and satisfaction with websites, to the extent that Ux or the same amount of user satisfaction will increase the site to the top rankings in search results .

Google standards for recognizing a good user experience
Google cares about the satisfaction and reaction of its users, so it examines all sites in terms of satisfaction and user experience. Here are some of the standards that Google uses to measure user satisfaction and user experience:

- High loading speed of the site:
If the loading speed of your site is high, the user will definitely have a good user experience , so Google can rate that site in terms of user experience.

- Site responsiveness:
If the sites that are designed can be displayed on other smart devices, the probability of increasing satisfaction and user experience is higher.

- How to produce content:
The content you produce should be such that it meets and meets all the needs of users, the content should not be repetitive and boring, the content should be up to date, the content produced must be comprehensive and complete to the user of the content Share you. In producing content, you need to be careful about when the best time to share content is.

- Review and optimization of internal links:
Internal links in the pages of sites lead to the transfer and transfer of users between the pages of the same site that users can be directed to other relevant and useful content by clicking on the links. The result is user satisfaction, or UX user experience.

- External links or backlinks:
​​​​​​​ Links that are referred to other sites can have a good effect on having a good user experience . By navigating through external links from one site to another to meet their needs and obtain more information about the site's performance, users are satisfied, which in turn leads to a good user experience for the site. In addition to external links, the age of the site domain can also lead to more trust of users, which in case of trust and satisfaction of users will also improve the user experience.

Benefits of user experience design:
1- Increases the conversion rate:
If the user experience is to the liking of the users and can satisfy them, it can penetrate the users and encourage them to perform some operations such as shopping. If there are two sites that are similar in content and both of them can meet the needs of the user, the user must choose one of them. A site that first catches the user's attention and forces him to choose between two options includes some features. This feature is the special and convenient user experience that has been able to attract the user. Therefore, if we have a suitable and user-friendly user experience, we can easily surpass our competitors and increase conversion rates, click-through rates , traffic and site visits.

2- Having a good user experience can help the site SEO:
Google search engine cares about user satisfaction more than anything and his priority is to satisfy users and provide quality sites to users. If a site has a strong and good user experience that can attract user attention and satisfaction, Google will be notified of this user satisfaction from the site. And it will put it in the top rankings of search results or will consider special points for that site. In other words, if Google sees the level of user satisfaction with a site, it will improve that site and will have a good effect on its SEO . Therefore, by designing a good user experience, we will satisfy the users, and finally, I will receive special points from the Google search engine, which can have very good effects on the SEO of the site .

3- Promotes the brand:
User experience is an important and necessary factor for the success of any job, which by having user experience and more people's satisfaction with the services and performance of the site, can increase sales or increase visits and other things. By creating a user experience, we increase and attract the trust of most users, which ultimately leads to the establishment of communication between users and business owners by users' trust in the business and their satisfaction with the performance. Communicating and creating interaction between users gradually increases user activities, which ultimately leads to branding and recognition and loyalty to your brand.

How to improve our site UX?
- Usefulness of the contents:
The contents that we put on the site must be useful in such a way that they cover the scope of all the needs of the users and are responsive to all their needs. Useful content that is honest, credible, complete and comprehensive. So if you want to improve the UX of the site to increase user satisfaction, you must use the content inside the pages of your site so that users can use them to meet all their needs.

- Easy access:
The design of your site should be such that users can easily access what they want. If the access path of users to different parts of the site is complicated, the user will be misled and will not be able to achieve what he needs. To increase user satisfaction, you should design the site and access different items in a way that is easily accessible.

- User-friendly appearance:
Using a variety of elements and colors together should be principled and standard, so that it is user-friendly and gives him a sense of confidence. Use colors that are appropriate for your type of business and users will enjoy looking at the look of your site.

- Interaction between users and business owners:
One of the most effective ways to increase user satisfaction is to establish deep communication and interaction between users and business owners. In this way, users can easily communicate with the business owner and share their needs with them and provide feedback to improve their performance.

- Short and concise contents:
In producing textual contents, it is better to pay much attention to the points mentioned in this article. Users do not spend their time reading all the written content and only with a little attention they scan the content to reach the most important things. In producing content and writing texts, you must write in a way that helps the user to easily scan the contents and texts to reach the important and desired items. Writing additional explanations that only takes the user time and does not meet his needs, causes their dissatisfaction. So in order to have a better user experience , you must write short and useful texts.

- Clarity of content:
In the production of content and communication with the user, you should use words that are clear and transparent and can easily convey the general concept to all users. Do not use technical and technical words as non-technical users may not notice. You need to consider all users from each group and produce and publish content at the public level. Your user experience will be better if your content is clear and obvious.

- Use of graphic communication:
​​​​​​​ Humans are more visually capable, and sometimes it is possible to use images better than text to convey some mesغیر مجاز می باشدes. In such a case, it is better to use images to convey content, because the use of visual mesغیر مجاز می باشدes is more effective than text mesغیر مجاز می باشدes, and users are interested in graphic images and are more easily attracted to them.

To increase user satisfaction with sites , we must focus on improving the user experience. This article contains valuable tips to increase user satisfaction and have a user experience, it is better to follow all the points mentioned in this article to have a good user experience .

Source:https://www.dotnek.com/Blog/Web/why-do-we-need-ux

Youtube:https://youtu.be/V0E8Cm8UqRk

Some sites have features that the Google search engine , when ranking, recognizes that these types of sites are bad and weak for display and presentation to the user, so they spam them and prevent them from being displayed to the user.

In this article, we will give some examples of features of sites that Google search engine considers as weak sites and spam them.

Spam site detection by Google bot

What is spam?
 Spam is everything that causes inconvenience to users. Spamming the site by Google robot also means that the site was very weak and could not be presented to users at all, so it was detected and spammed by Google robot. This means that this site is not only not useful for users, but may also cause them inconvenience. Google has repeatedly stated that providing high quality content is very important for users, so the Google robot tries to identify quality sites and provide them to users, and on the other hand, identifies weak and bad sites and shows and Providing them to users prevents this from being called spam. In other words, it detects bad, poor and low quality sites and does not show them to users, which is called spam by Google.

Features of sites that are likely to be spammed:
- Duplicate content:
One of the features that, if sites have, is that they are spammed by the Google search engine is duplicate content. In this way, the Google search engine with its updates and according to some of its algorithms when indexing site content can easily detect duplicate and duplicate content.

The Google search engine stores the contents of their site in its database when it is indexed, and if it later indexes another site and detects that its contents have been copied and already indexed, it will not rank that site well and may even It can also spam it. Because such sites are not suitable for offering to users at all.

- Lack of site optimization:
Site owners should check and optimize their site so that they do not have problems when indexed by Google search engine. There may be some banned code in their source site that is not appropriate due to Google's new algorithms. Or there may be some backlinks and external links to blocked and spammed sites, in which case your site may also be spammed. Having backlinks on spammed sites also increases the risk and likelihood of your site being spammed, so be sure to review and optimize the site source. The presence of pop-up codes in the source site also increases the likelihood of spam by Google search engine. Google has stated that it does not like this type of code. Therefore, in order for your site and content to be liked by Google and not have the risk of spam, you should check the source of your site and delete and edit the items that are not liked by Google.

- Content sharing too fast or too slow:
Some site owners do not balance the content on the site. Or sometimes they put content on the site very quickly, or very slowly. Balance in the speed, number and amount of content placed on the sites must be observed. It should not be so that in one day he put about 50 or even more on the site and in the following days he did not put any content on the site at all. In this case, Google bots, which are very smart, will suspect your site and refuse to display it to users. Because Google has repeatedly stated that users are very important and provides them with quality content and sites, not low quality sites and content.

Therefore, one of the other things that cause the site to be spammed is the lack of balance in placing the content on the site. To prevent this, it is better to observe the balance and prevent your site from being spammed.

- Sneaky redirect:
Google search engine robots are very intelligent and can easily detect suspicious or deceptive SEO tricks and spam them to prevent them from being displayed to users. Another thing that increases the likelihood of being spammed if it exists on sites is sneaky redirects. Sneaky redirects are unrelated and secret redirects done by SEOs or site owners. Sneaky redirects redirect the user to pages unrelated to the word the user was searching for. In other words, the user searches for a word in the search engine but is not directed to the page associated with that word and is redirected to unrelated pages and content, which causes annoyance and annoyance to the user that Google bots in If these scams are detected, it will quickly spam the site so that it can no longer deceive other users.

- Keyword stuffing:
How do search engines treat spammy pages?
Depending on the use of black hat SEO and deceptive tricks , a site may be permanently removed from search results.

- If the deceptive tricks used by a site are less, it may cause a temporary drop of the site and then return to the site.
- May cause rankings in search results with some important site keywords.

What are the solutions to the Spamdexing problem?
Providing solutions to solve the problem depends on the extent of the problem, and due to the magnitude of the problem, SEOs and SEO experts provide solutions, but if the problem is serious and large, there may be no guarantee that the site and traffic will return. Previous does not exist.

Therefore, it is better to identify all the things that cause the site to be spammed and avoid doing them, because it will cause your site to be spammed and removed.

Source:https://www.dotnek.com/Blog/Web/spam-site-detection-by-google-bot

Youtube:https://youtu.be/ci5F7nu7QSs

take the necessary measures to improve the performance of internal SEO, because as external SEO is very important, internal SEO is very important. It is also important and can affect the success or failure of businesses and sites.

What is internal SEO?
All the necessary actions that are done inside the site and are related to internal coding are called internal SEO . Internal SEO, like external SEO, has an effect on having better rankings in search results. SEO has two parts: - External SEO - Internal SEO Most web designers or business owners focus on external SEO and performance improvement and sometimes forget about internal SEO. Internal SEO is related to all the points inside the site and the site coding, it is possible that a site has a better external SEO , but due to not paying attention to the internal coding, the internal SEO of the site will also destroy the external SEO, which is why We must not forget to pay attention to both external and internal SEO and take the necessary measures to improve their performance.

The important points that should be considered in internal SEO are as follows:
- Content Title:
In order to improve internal SEO , we must write a unique and non-duplicate title and title for each content that also includes keywords. Content titles should include keywords to make it easier and faster to find results when searching. The title of the content has a special and strong point, and writing a keyword in it makes it easier and faster to appear in search results.

- Meta-descriptions:
Meta-descriptions are short descriptions that contain keywords and in 160 letters to the Google search engine explains what this content is about to give special points when searching and indexing Google content. According to the new algorithms of Google search engine, special attention is paid to the meta descriptions of each content, and if the Google search engine does not find a connection between the content and the meta description, it will spam the content and the page. Therefore, meta description is very important and to improve the performance of internal SEO , the insertion of meta description should not be forgotten.

- Site URL:
URL has a great impact on the presence of pages and content in the top rankings of search results . In order for the site to rank better and have both good internal and external SEO, we need to use keywords in the URL of the pages and the site. Using keywords in the URL has a huge impact on indexing and ranking in the top search results. Google has stated that the first 3 to 5 words of the URL are very important, meaning that the use of keywords in these sections can be effective. The URL should be short, concise, and legible, and should be easy to remember. Do not create long, unreadable URLs.

- Text tags:
​​​​​​​ In order for text contents to be easily readable and have an improved structure, sections or tags must be used. If tags are used to segment and optimize the structure of textual content, the texts will be easy for visitors to read and can be easily indexed by search engines. Tags are H1 to H6 tags. The H1 tag is used to write the main titles, it should be noted that these tags have a special point and the search engine pays more attention to them. Therefore, you should use the keywords inside this tag so that it can be in the search results when searching. After the H1 tag is the H2 tag, which is used to insert important internal titles. The score of this tag is less than the H1 tag and the ratio of the H3 to H6 tags is higher. Using these tags to segment textual content and make it easier to read can also be effective in having a good internal SEO .

- Appropriate places to use keywords:
Using keywords within the text is very important, but keywords must be used in the right place to have the desired results. Before updating Google algorithms, using more keywords was effective, but after updating the new Google search engine algorithms , keywords should be used in the right places and in the right number. If the right number of keywords are used in the right places, Google search engine can easily identify the subject of the content and display it in the search results to users. The average number of keywords that should be used in textual content is about 2 to 5% of the total content, and the right places to use keywords are tags that have special privileges. It is better to use keywords in titles and headings or tags to be better seen by search engines.

- Optimizing photos:
Using images within content can add to its appeal, and users are more attracted to visual content than text. Because visual content can easily convey the mesغیر مجاز می باشدe to the audience in the best way. The very important point in using images is that in order to have a good internal SEO , we must optimize the images. Image optimization is such that the Title and ALT attributes must be inserted. The ALT attribute is text that displays text instead of the image when it is not loaded or displayed.

Title is the title of the image that is displayed when the mouse is placed on the image of the subject and the title of the image. In inserting both of these features, a keyword must be written so that it is considered by search engines when searching and displayed in better results.

- Internal linking:
In addition to backlinks and external linking, internal linking is also very important and can be effective for having a good SEO . Backlinks and external links link the site and pages and direct users to other sites, but as important as backlinks are, internal links are also effective. Internal links allow users to move between pages of a site and go from page to page within the same site. In addition, internal links make the pages and site live and in other words, not deadlocked. In this case, search engines can go to other pages of the site through internal links and index them to display in search results. Lack of internal links causes the site to be dead and deadlocked and transfer through links to other pages of the site is not possible and pages of other sites are not viewed. So in order for both users and search engines to have access to other pages of the site and be transferred, link building must be done.

- Responsive design of sites:
Today, with the increase in the number of people who use other smart and portable devices such as mobile phones and tablets, responsive design of sites is essential for the site to be indexed by search engines in the best way and to be in the top ranks of search results must be designed to be responsive. By updating its new algorithms, Google has announced that it pays special attention to sites that are designed to be responsive, and if a site is not designed to be responsive, it may prevent users from displaying it in the top rankings of search results. Slowly in order to have a good SEO , site owners must design their site responsively, because a large number of users use mobile phones and tablets to visit the sites. So if someone is looking for the site to be seen by a large number of visitors and to be displayed in the top rankings of search results when indexed by Google search engine, they should design the site responsibly.

- Increase site loading speed:
According to Google, sites that take more than 3 to 5 seconds to load will discourage users and other users will stop visiting those sites. So in order for the site and pages to be seen by visitors, it must have a high loading speed. There are many techniques and tricks to increase the speed of the site, and you can increase the loading speed of the site by changing the hosting of your site, optimizing large images and compressing various types of content while maintaining their quality. The use of bulky content and spammed links or heavy graphical structure can slow down the loading speed of the site, keep in mind that to increase the loading speed, avoid using this content.

- Increasing the duration of users' presence on the site:
After attracting and increasing the number of site visitors, the focus should be on retaining users and increasing the duration of their presence on the site. As the length of time users stay on the site, the Google search engine will think that your site and content are user-friendly and users are satisfied with your site, in which case it will consider special points for your SEO. Increasing the duration of users' presence on the site and the click-through rate has a great impact on the internal and external SEO of the site and can cause their presence in the top rankings of search results. In addition to focusing on increasing the user's presence on the site, increasing click-through rates and conversion rates should also focus on reducing bounce rates. All of these are factors that can be effective in having a good and strong SEO .

- Presence in social networks:
​​​​​​​ By participating in social networks and being in public, you can attract many users and convince them to visit your website. If you can have an effective presence on social networks and convince users to buy and do link building for this, you can transfer more traffic from social networks to your site. SEO will also improve with increasing site traffic .

All the points mentioned in this article are good factors for having external or internal SEO, but note that all the points mentioned in this content are not the only effective factors and in addition there are other effective factors to have A good SEO must be observed.

Source:https://www.dotnek.com/Blog/Web/internal-seo-tips-that-you-should-know

Youtube:https://youtu.be/FS96wHHTVJo