在窗口游戏中保存和加载游戏状态

目前我使用XNA 4.0 Game Studio和Visual Studio 2010提供的Window Game Statement Management模板来开发游戏。关于如何保存和加载游戏状态有什么建议吗?之前我开发过一款窗口手机游戏，数据存储在IsolatedStorage中。这和Window Game有什么相似之处吗?

         using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForAssembly())
            {
                using(IsolatedStorageFileStream stream = file.OpenFile("class123.xml",FileMode.Create))
                {
                    XmlWriterSettings setting = new XmlWriterSettings();
                    setting.Indent = true;
                    using(XmlWriter writer = XmlWriter.Create(stream,setting))
                    {
                        XmlSerializer serializer = new XmlSerializer(typeof(Student));
                        serializer.Serialize(stream,new Student(){Name = "AhLim"});
                    }
                    using (XmlReader reader = XmlReader.Create(stream))
                    {
                        XmlSerializer serializer = new XmlSerializer(typeof(Student));
                        studentA = (Student)serializer.Deserialize(reader);
                    }
                }
            }

这是我最近在视窗游戏应用程序中使用的代码。然而，当我到达反序列化部分时，它显示InvalidOperationException未处理，XML文档(0,0)上出现错误。我可以知道问题出在哪里吗?