X# 2.16.0.5
PLEASE NOTE
Visual Studio 2020, version 17.7 has introduced a breaking change that breaks the X# support in Visual Studio.
There is no problem in VS 2017 and VS 2019.
This will be fixed in the upcoming 2.18 release.
As a workaround download the DLL from https://www.xsharp.eu/itm-downloads/download?path=installers%252FMicrosoft.Windows.Design.Host.zip and follow the installation instructions