Use WPF with .NET Standard Library

Question

Is it possible to use WPF within an .NET Standard Class Library or is this to be reserved for .NET Core? If so, is it possible to setup a .NET Core Class Library that uses WPF or does it necessarily have to be a .NET Core App?

Answer 1

Finally, I got in contact with Microsoft. They were very helpful and provided the following snippet of a *.csproj file to me:

<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <UseWPF>true</UseWPF>
  </PropertyGroup>
</Project>

With this, I get a .NET Core class library including WPF. Additionally, I had to remove App.xaml and App.cs. This was necessary since those contain <Application> tags in XAML which aren’t allowed in WPF libraries.