Modernizing a WinForms application with XAML Islands

It's time to build a simple WinForms app that will host a custom UWP user control from another project. We will create a UWP project containing a simple input form and add it to a window in a .NET 5 WinForms project. You can use an earlier version of .NET Core if you like, but we will use .NET 5.0 in this example.

Creating a shared class library project

We will start off by creating the UWP class library. Class libraries help promote code reuse and encapsulate UI appearance and behavior. A NuGet repository is a great way to share code within your company and the OSS community. You can find out more information about NuGet hosting options on Microsoft Docs at https://docs.microsoft.com/en-us/nuget/hosting-packages/overview.

Note

We are creating a UWP class library because XAML Islands does not support WinUI 3.0 projects yet. Once this support is available, you will be able to follow this same technique with a WinUI...