How to add reference/package for system.windows.documents namespace in .NET 6.0

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I am targeting the .NET 6.0 framework in a new WPF project and would like to use a RichTextBox control (RTB). I understand the RTB outputs its content as a FlowDocument.

Code samples showing how to work with a FlowDocument in earlier frameworks use the System.Windows.Documents namespace. Microsoft's documentation for the FlowDocument Class refers to this namespace in the definition.

I can't find a reference/Nuget package for adding this dependency in .NET 6.0. Can someone please tell me how to find/add this?

What I have tried:

Looked for code samples and in Microsoft documentation for FlowDocument Class

Posted 6-Mar-22 4:16am

pjamieson

Updated 6-Mar-22 6:11am

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Maciej Los 6-Mar-22 12:01pm

Maybe you need complete control? See: NuGet Gallery | C1.WPF.RichTextBox 6.0.20213.167[^]

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pjamieson · Accepted Answer · 2022-03-06T06:11:00

Figured it out. I added Microsoft.WindowsDesktop.App.WPF as a dependency in my Class Library. In the .csproj file this changed the PropertyGroup from:

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

to:

<PropertyGroup>
  <TargetFramework>net6.0-windows</TargetFramework>
  <ImplicitUsings>enable</ImplicitUsings>
  <Nullable>enable</Nullable>
  <UseWPF>true</UseWPF>
</PropertyGroup>

In my ViewModel I can now refer to the System.Windows.Documents namespace through:

using System.Windows.Documents;

and create a FlowDocument object via:

C#

FlowDocument flowDocument = new();