In MSTest how to check if last test passed (in TestCleanup)

The answer by @MartinMussmann is correct, but incomplete. To access the "TestContext" object you need to make sure to declare it as a property in your TestClass:

[TestClass]
public class BaseTest
{
    public TestContext TestContext { get; set; }

    [TestCleanup]
    public void TestCleanup()
    {
        if (TestContext.CurrentTestOutcome != UnitTestOutcome.Passed)
        {
            // some code
        }
    }
}

This is also mentioned in the following post.

Solution

if (TestContext.CurrentTestOutcome != UnitTestOutcome.Passed)
{
    // some code
}