public static void AreNotEqual(Object expected, Object actual, string message)
 {
     if (actual == expected)
     {
         Fail(AssertionMessageUtil.GetEqualityMessage(
                  actual, expected, expectEqual: false), message);
     }
 }
 public static void AreNotEqual <T>(T expected, T actual,
                                    string message, IEqualityComparer <T> comparer)
 {
     if (typeof(Object).IsAssignableFrom(typeof(T)))
     {
         AreNotEqual(expected as Object, actual as Object, message);
     }
     else if (comparer.Equals(actual, expected))
     {
         Fail(AssertionMessageUtil.GetEqualityMessage(actual,
                                                      expected, expectEqual: false), message);
     }
 }