ExceptionAssert includes a Throws static method which is meant to replace the usage of the ExpectedException attribute as a more targeted way of testing for an exception.

ExceptionAssert.cs

public static class ExceptionAssert
{
	public static void Throws<T>(Action code, string exceptionMessage = null, string message = null, params object[] args) where T : Exception
	{
		try
		{
			code.Invoke();

			Assert.Fail("No exception was thrown by the code under test.");
		}
		catch (Exception exception)
		{
			if (string.IsNullOrWhiteSpace(exceptionMessage))
			{
				Assert.AreEqual(exception.GetType(), typeof(T), message, args);
			}
			else
			{
				Assert.AreEqual(exception.GetType(), typeof(T), message, args);
				Assert.IsTrue(exception.Message.StartsWith(exceptionMessage, StringComparison.OrdinalIgnoreCase));
			}
		}
	}
}