AvalonEdit is the name of the WPF-based text editor in SharpDevelop 4.x "Mirador" and beyond. It is also being used in ILSpy and many other projects.
AvalonEdit is available as NuGet package. Usage details, documentation and more can be found on the AvalonEdit homepage
AvalonEdit is targeting net6.0-windows and net462 TFMs. Because of net6.0-windows you must have the .NET 6.0 SDK installed on your machine. Visual Studio 2022 Community and up is required for working with the solution (global.json will select the proper SDK to use for building for you).
Check out the official documentation and the samples and articles wiki page
To build the Documentation you need to install Sandcastle from https://github.com/EWSoftware/SHFB/releases (currently validated tooling is v2021.4.9.0)
The build of the Documentation can take very long, please be patient.
AvalonEdit is distributed under the MIT License.
A good place to start are the "top 10" listed under GitHub Usage for the AvalonEdit package on NuGet.
Note: if your project is not listed here, let us know! :)