Both test framework and adapter set UseAssemblyVersion14 to true.

We shouldn't do that anymore, and MSTest assemblies should be properly versioned, similar to MTP assemblies.

This means that in v4, we will have to use a lower version (4.x) instead of 14.x, which may also be problematic that a newer version of the assembly is actually using an older version number. Thus, I also think it's safest to rename the assembly altogether.

• Instead of Microsoft.VisualStudio.TestPlatform.TestFramework, we simply use MSTest.TestFramework
• Instead of Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter, we simply use MSTest.TestAdapter.

NOTE: I'm suspecting that fixing the version to 14.0.0.0 may be causing issues on .NET Framework when dealing with GAC.