Fettle.Console (nuget): Fettle is an experimental mutation testing tool for C# code. It can mutate C# code that runs on the .NET Framework (Mono or .NET Core are not supported).  If your tests use NUnit 3, Fettle will use them by default (version 3.10 or higher recommended). Or if you use another framework, or need to run them in a special way, then you can use a custom test runner command.
Keywords: test|testing|mutation-testing|csharp