Xamarin.Forms is one of the most popular and best options for designing and developing different types of mobile applications that are multi-platform. Xamarin's multi-platform nature is one of its advantages and makes it possible to have several different outputs on several different platforms with just one coding. The output of the code written in Xamarin.Forms in C # will be on the platform of Android, iOS and Windows operating systems. One of the reasons that makes using Xamarin necessary for designing and developing applications is that the code in Xamarin is compiled natively, which means that if the design and construction of applications are done well, it can be distinguished from Applications designed and built using Xcode will not be.To build the first app using Xamarin.Forms on iOS, some app developers use languages and IDEs provided by Apple itself, using languages and IDEs provided by Apple is the only way There is no building and developing applications, and there are other ways and languages to build and design different types of applications in the iOS operating system.Xamarin has had a high cost drawback in the past, but after it was bought by Microsoft and released new and updated pads, the purchase price also went down. So that all companies and small and personal businesses can also benefit from Xamarin facilities and use it to design different types of applications on different platforms.

The features that Xamarin provides to developers are as follows:

- Ability to share written code

- Ability to re-use written code to output on other platforms

- Ability to use all libraries and tools in C # to better build and develop applications

How to build the first application using Xamarin.Forms?

You must first have Visual Studio and Xamarin installed on your system, which in this article assumes that you have Xamarin and Visual Studio installed.1- Open Visual Studio.

2- Follow the steps File - New - Project to create a new file in Visual Studio.

3- In the left panel, select the cross-platform option. Since Xamarin.Forms is multi-platform and can get multiple outputs on multiple platforms at once, it is better to choose this option to create the first multi-platform application.

4- Then in the window that opens, select the Blank App option (Xamarin.Forms. Portable).

5- Enter the name Solution and project. For example, in this tutorial we will select the project name sampleXamarinForms. 

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