Cannot find System.Xaml in .net 6

Question

I created a console application with a target framework of .net 6.0 in order to write a custom Xaml writer. This is the project configuration:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

I want to extend the XamlXmlWriter class but I can't import it. If I add using System.Xaml I get: The type or namespace Xaml does not exist in the namespace System. What am I missing?

Answer 1

You need two changes to your project file:

• Target net6.0-windows instead of net6.0
• Add <UseWPF>true</UseWPF> as an additional property

As per the documentation, it looks like XamlXmlWriter is available in the Windows Desktop framework for .NET 6, but not in "general" .NET 6.