TestCleanup cannot be async?

Question

As far as I understand testcleanup can't be async for example (for example here https://social.msdn.microsoft.com/Forums/vstudio/en-US/3a23bd9d-7a5a-490e-a199-b8dfa309f39e/unittesting-problem-with-async-testinitialize-method?forum=vstest)

But i didn't found anything in official documentation(https://msdn.microsoft.com/en-us/library/microsoft.visualstudio.testtools.unittesting.testcleanupattribute.aspx) also it does compiled in VS successfully.

I have two questions:

1. Could someone explain to me why?
2. Is there any official documentation about it?

Answer 1

TestCleanup still cannot be async.

If you're looking for a code example try this:

[TestCleanup]
public void TestCleanup()
{
     Task Action() => MyAsyncMethod(myparams);
     Task.Run(Action);
}