In MS C# Unit Testing, how to Assert that an ArgumentException occured?

Question

If we do a

throw new ArgumentException("Cannot do that");

How do you Assert that this ArgumentException happened with Microsoft's Testing Framework?

Answer 1

You could decorate your unit test with the [ExpectedException] attribute:

[ExpectedException(typeof(ArgumentException))]
[TestMethod]
public void Foo()
{
    throw new ArgumentException("foo");
}

Don't ask though about asserting the exception message :-)