Throw Exception Helper for Asserts

AssertThrowHelper.cs

//            var myTest = new Namespace.TheService();            
//            var ex = ExceptionFactory.Throws<InvalidOperationException>(() =>
//                myTest.Result = myTest.Execute() );
//            Assert.AreEqual(myTest.Result, null);
//            Assert.AreEqual(ex.AnyProp, "ExpectedData");

    public static class ExceptionFactory
    {
        public static T Throws<T>(Action action) where T : Exception
        {
            try
            {
                action();
            }
            catch (T ex)
            {
                return ex;
            }
            Assert.Fail("Exception of type {0} was thrown.", typeof(T));

            // Don't show the exception message
            return null;
        }
    }