What are the different code sharing techniques in xamarin forms?

There are 3 code sharing techniques in xamarin forms:

• PCL (Portable Class Libraries): It targets different platforms with a common API interface which provides a platform-specific functionality.
• Shared Project: We use a shared project to organize source code and manage platform-specific requirements using the #if compiler.
• Dot Net standard libraries: It allows you to implement code to share across different platforms and can be accessed by a large number of .Net APIs.