NetWorkStream ns=new NetWorkStream(tcpclient.GetStream());

    Byte[] WriteBytes = new Byte[1024];
    
    TcpClient Client = new TcpClient(...);
     NetworkStream Stream = Client.GetStream();
    WriteBytes[0] = 65;
    WriteBytes[1] = 48;
    WriteBytes[2] = 54;
    WriteBytes[3] = 53;
    WriteBytes[4] = 48;
    WriteBytes[5] = 48;
    WriteBytes[6] = 48;
    WriteBytes[7] = 51;
    Stream.Write(WriteBytes, 0, 8);
    .....
    WriteBytes = new Byte[1024]; 
    WriteBytes[0] = 65;
    WriteBytes[1] = 48;
    WriteBytes[2] = 54;
    WriteBytes[3] = 53;
    WriteBytes[4] = 48;
    WriteBytes[5] = 48;
    WriteBytes[6] = 48;
    WriteBytes[7] = 51;
    Stream.Write(WriteBytes, 0, 8);

------解决方案--------------------
上面贴的有点小问题，改下

C# code

    Byte[] WriteBytes = new Byte[1024];
    
    TcpClient Client = new TcpClient(...);
     NetworkStream Stream = Client.GetStream();
    WriteBytes[0] = 65;
    WriteBytes[1] = 48;
    WriteBytes[2] = 54;
    WriteBytes[3] = 53;
    WriteBytes[4] = 48;
    WriteBytes[5] = 48;
    WriteBytes[6] = 48;
    WriteBytes[7] = 51;
    Stream.Write(WriteBytes, 0, 1024);
    .....
    WriteBytes = new Byte[1024]; 
    WriteBytes[0] = 12;
    WriteBytes[1] = 33;
    WriteBytes[2] = 54;
    Stream.Write(WriteBytes, 0, 1024);

------解决方案--------------------
 public static byte[] Read(NetworkStream netstream)
       {
           byte[] buffer = new byte[1024];
           byte[] rebuffer;
           try
           {
               int i = netstream.Read(buffer, 0, buffer.Length);
               rebuffer = new byte[i];
               Buffer.BlockCopy(buffer, 0, rebuffer, 0, i);
               return rebuffer;
           }
           catch
           {
               return null;
           }
       }

这个方法可以解决你的问题!

------解决方案--------------------
返回值为实际需要读取的数据,也就是说去掉了那些没用的数据!

------解决方案--------------------
解决了没？

------解决方案--------------------
NetworkStream stream = client.GetStream();
应该不是NetworkStream 的问题。
问题应该在Write 方法发送的byte[] 或接收的byte[] 中。

------解决方案--------------------
探讨

你这个方法是覆盖Byte的0-7下标值对应的位。 

我的那个情况是。 

后面会自己追加上次的通信数据。 

即使你覆盖，但到后面不够长的位置，也还是不行。