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Re:Understanding the .NET ecosystem: The evolution of .NET i... by SgtBastard on Tuesday March 21, 2023 @08:10PM (#35254742)
Yes:

https://learn.microsoft.com/en-us/dotnet/core/install/linux

Also VS Code, an open source IDE with first class support for .NET languages:

https://code.visualstudio.com/docs/setup/linux

Re:Understanding the .NET ecosystem: The evolution of .NET i... by all2 on Tuesday March 21, 2023 @11:20PM (#35256400)
Also emacs has a pretty good csharp language server integration. I personally use the Spacemacs "dotnet" layer.