C# Windows Runtime Component WinUI Controls Sample

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This sample demonstrates how to author C# components with WinUI controls (User Control and Custom Control) using C#/WinRT, and how to consume these components from C++ and C# apps.

The sample solution includes the following application projects:

• CppApp (packaged C++ WinUI app)
• CppAppUnpackaged (unpackaged C++ WinUI app)
• CsApp (packaged C# WinUI app)

All the application projects have a project reference to the C# Windows Runtime component library project, WinUICsComponent. The C# component uses the Microsoft.Windows.CsWinRT NuGet package to generate a Windows Runtime Component with custom WinUI controls.

Prerequisites

• See System requirements for Windows app development.
• Make sure that your development environment is set up correctly—see Install tools for developing apps for Windows 10 and Windows 11.

Building and running the sample

• Open the solution file (.sln) in Visual Studio.
• Set one of the application projects as the startup project.
• From Visual Studio, either Start Without Debugging (Ctrl+F5) or Start Debugging (F5).

Related Links

• C#/WinRT Authoring
• Walkthrough—Create a C# component with WinUI 3 controls, and consume it from a C++/WinRT app that uses the Windows App SDK