public static void Compare<T>(T expected, T actual, params string[] exclude)

        {

            Assert.IsNotNull(expected);

            Assert.IsNotNull(actual);

            List<string> p = new List<string>();

            if (exclude != null)

            {

                p.AddRange(exclude);

            }

            foreach (var pi in typeof(T).GetProperties())

            {

                if (p.SingleOrDefault(a => a.Equals(pi.Name, StringComparison.InvariantCultureIgnoreCase)) != null)

                {

                    continue;

                }

                Assert.AreEqual(pi.GetValue(expected, null), pi.GetValue(actual, null), pi.Name);

            }

        }

[TestMethod()]

        public static void Test()

        {

            var a = new MailMessage()

            {

                Subject = "MYSubject",

                Body = Guid.NewGuid().ToString()

            };

            var b = new MailMessage()

            {

                Subject = "MYSubject",

                Body = Guid.NewGuid().ToString()

            };

            Compare<MailMessage>(a, b, null);//will fail

            Compare<MailMessage>(a, b, "Body");//will pass

        }