xUnit.net inspired ExpectedExceptionAttribute alternative for MSTest

Expect.cs

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace UnitTests
{
    /// <summary>
    /// Fluent interface for expected exceptions.
    /// </summary>
    /// <example>
    /// Expect.Exception(() => DoSomethingBad())
    ///       .OfExactType<CriticalException>()
    ///       .WithMessage("You can't build there.");
    /// </example>
    /// <example>
    /// Expect.Exception(delegate 
    /// {
    ///     DoSomethingBad();
    /// });
    /// </example>
    public class Expect
    {
        public delegate void ThrowsDelegate();

        public static Expect Exception(ThrowsDelegate testCode)
        {
            try
            {
                testCode();
                Assert.Fail();
            }
            catch (Exception actual)
            {
                return new Expect(actual);
            }

// ReSharper disable HeuristicUnreachableCode
            // Heuristically unreachable, but compiler required.
            return null;
// ReSharper restore HeuristicUnreachableCode
        }

        private readonly Exception _actualException;

        protected Expect(Exception actual)
        {
            _actualException = actual;
        }

        public virtual Expect WithMessage(string expectedMessage)
        {
            Assert.IsNotNull(_actualException);
            Assert.AreEqual(expectedMessage, _actualException.Message);
            return this;
        }

        public virtual Expect OfType<TException>()
            where TException : Exception
        {
            Assert.IsNotNull(_actualException);
            Assert.IsInstanceOfType(_actualException, typeof(TException));
            return this;
        }

        public virtual Expect OfExactType<TException>()
            where TException : Exception
        {
            Assert.IsNotNull(_actualException);
            Assert.AreEqual(typeof(TException), _actualException.GetType());
            return this;
        }
    }
}