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

        }

 FieldInfo a;

            FieldInfo b;

            Assert.AreEqual(a.FieldType, b.FieldType, "field type");

            Assert.AreEqual(a.IsAssembly, b.IsAssembly, "is assembly");

 public static void CompareObjects(object a, object b)

        {

            if (a == null) Assert.Fail("a is null");

            if (b == null) Assert.Fail("b is null");

            Type t1 = a.GetType();

            Type t2 = b.GetType();

            if (t1 != t2)

            {

                Assert.Fail("Type a (" + t1.Name + ") is not as type as type b(" t2.Name + ")");

            }

            PropertyInfo[] pi = t1.GetProperties();

            for (int i = 0; i < pi.Length; i++)

            {

                object val1 = pi[i].GetGetMethod().Invoke(a, null);

                object val2 = pi[i].GetGetMethod().Invoke(b, null);

                Assert.AreEqual(val1, val2, pi[i].Name);

            }

        }

public static void CompareObjects(object a, object b, string[] exclude)

        {

            if (a == null) Assert.Fail("a is null");

            if (b == null) Assert.Fail("b is null");

            Type t1 = a.GetType();

            Type t2 = b.GetType();

            if (t1 != t2)

            {

                Assert.Fail("Type a (" + t1.Name + ") is not as type b (" + t2.Name + ")");

            }

            PropertyInfo[] pi = t1.GetProperties();

            for (int i = 0; i < pi.Length; i++)

            {

                if (exclude != null && Array.IndexOf<string>(exclude, pi[i].Name) > -1)

                {

                    continue;

                }

                object val1 = pi[i].GetGetMethod().Invoke(a, null);

                object val2 = pi[i].GetGetMethod().Invoke(b, null);

                Assert.AreEqual(val1, val2, pi[i].Name);

            }

        }

 Customer a;

            Customer b;

            CompareObjects(a, b, new string[] { "Id", "LastUpdate" });