Hi, you need to make sure you're using "Visual Studio 2022 Preview", not just Visual Studio. Even with "Use Preview SDK's" enabled in the VS2022 tools and options, it will not work unless you have the preview version of Visual Studio installed. You can still create .Net8 projects in Visual Studio, but to build and run them, you will need to do it from the command line (i.e. 'dotnet run').