今天在对字节流转换为对象时，发现总是会报错，后来查明原因是要将流的Index设置为起始位置，因为序列化后Index移到了

流的末尾，所以才报错了。代码如下：

public static T  DeSerializer<T>(byte[] buffer, int length)

        {

            try

            {

                string mTextReceived = Encoding.UTF8.GetString(buffer, 0, length);

                SocketDataPack sdp = GetSocketDataPackFromString(mTextReceived);

                //MemoryStream对象提供了无需进行IO就可以创建Stream的方法

                MemoryStream stream = new MemoryStream();

                BinaryFormatter formatter = new BinaryFormatter();

                formatter.Serialize(stream, sdp);

                //将流的Index设置为开始位置

                stream.Position = 0;

                // 确保书写器更新到Stream中；

                stream.Flush();

                object obj = formatter.Deserialize(stream);

               

                if (obj == null)

                {

                    return default(T);

                }

                return (T)obj;

                

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }