Personally, I tried several, but my preference is two:
1: TestDriven.NET - for simple testing; I usually use it with Team Coverage, which allows me to see coverage directly in the editor, even if the tests are based on NUnit (not MSTest).
2: the tiny add-on that allows me to group files in the same way as the IDE is easier than manually editing csproj (DependentUpon IIRC). From here , but there are (unrelated) updated msi here with better support for choosing which file is the parent (hold [Ctrl] while selecting "Group Elements")
I never found that I needed ReSharper, etc., but I have to give it another try one day ...
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