字节流转换为对象的方法

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;
            }
        }