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 public static string GetObjectUpdateInfo<T>(T old, T current)
        {
            string info = string.Empty;

            Type type = typeof(T);

            PropertyInfo[] propertys = type.GetProperties();

            foreach (PropertyInfo property in propertys)
            {
                if (property.PropertyType.IsValueType || property.PropertyType.Name == "String")
                {
                    if (property.PropertyType.FullName.Contains("Guid")) continue;

                    object o1 = property.GetValue(old, null);
                    object o2 = property.GetValue(current, null);
                    string str1 = o1 == null ? string.Empty : o1.ToString();
                    string str2 = o2 == null ? string.Empty : o2.ToString();

                    if (str1 != str2) info += property.Name + " from " + str1 + " to " + str2 + "\r\n    ";
                }
            }

            return info;
        }