Guid 使用记录

            Guid gi = Guid.Empty;
            Response.Write("-----------<br/>");
            Response.Write(gi.ToString()); //输出为 00000000-0000-0000-0000-000000000000
            Response.Write("-----------<br/>");            

            Guid gi1 = Guid.Parse("00000000-0000-0000-0000-000000000000");
            if (gi==gi1)
            {
                Response.Write("-----gi==gi1------<br/>");
            }
            if (gi1 == Guid.Empty)
            {
                Response.Write("-----gi1==Guid.Empty------<br/>");
            }

            Response.Write("Guid.Empty:<br/>"+Guid.Empty.ToString());
            Response.Write("Guid us = null;错误的复制方法！" + Guid.Empty.ToString());