public static void Main(string[] args)
        {
            string str = "this is a string.";
                Console.WriteLine(str);
string strcopy =string.Copy(str);
        bool testbool = ((object)str == (object)strcopy);
           Console.WriteLine(testbool);
           Console.Read();
       }

为什么结果显示false,感觉两个应该是一样的啊，应该是True啊。