Sharing Code On Multiple Platforms
This section provides a guide on some of the more common things tasks or concepts that developers need to be aware of when developing mobile applications.
Learn about the different code sharing options available for Xamarin projects, including Portable Class Libraries (PCLs), Shared Projects, and .NET Standard Libraries.
Portable Class Library projects let you build and distribute assemblies that contain shared code to run on multiple platforms. To create a Portable Class Library (or "PCL") you first select which platforms to target, then write code against a sub-set of the .NET Framework that is available in the profile defined for those platforms. This document describes how to create and use PCLs with Xamarin.
Shared Projects let you write common code that is referenced by a number of different application projects. The code is compiled as part of each referencing project and can include compiler directives to help incorporate platform-specific functionality in the shared code base. This article discusses how Shared Projects work and how to create and use them with Xamarin projects.
.NET Standard is a new option for sharing code across platforms. It works in a similar fashion to Portable Class Libraries; code is built against a specific version (currently 1.0 through 1.6) and can then be consumed by other projects that support that level or higher. .NET Standard projects are supported in Xamarin Studio 6.2, Visual Studio for Windows, and Visual Studio for Mac.
NuGet packages can be automatically generated from PCL or .NET standard projects; and Shared Projects can be packaged into "bait and switch" NuGet packages using the separate NuGet project type. This section explains how to create NuGet packages for each code-sharing scenario.
Tips for creating NuGet packages that work with the Xamarin platform.