C#和C++之间的双工名称管道

我在C#服务器和C++之间进行双工通信时遇到了一些问题：

目标是创建管道，从客户端读取内容并写回内容。如果我只是从客户那里阅读或写信给客户，一切都很好，但我不能一个接一个地同时做这两件事！

这是我的C#服务器：

// Create a name pipe
 using (NamedPipeServerStream pipeStream = new NamedPipeServerStream("TestPipe"))
 {
   Console.WriteLine("[Server] Pipe created {0}", pipeStream.GetHashCode());
   // Wait for a connection
   pipeStream.WaitForConnection();
   Console.WriteLine("[Server] Pipe connection established");
   //Reading Part
   using (StreamReader sr = new StreamReader(pipeStream))
   {
      string temp;
      while ((temp = sr.ReadLine()) != null)
      {
         Console.WriteLine("{0}: {1}", DateTime.Now, temp);
       }
     }
     //Writing Part
     using (StreamWriter sw = new StreamWriter(pipeStream))
     {
        sw.AutoFlush = true;
        String st = "send Back";
        sw.WriteLine(st);
     }
 }

这是C++客户端：

HANDLE hFile;
BOOL flg;
DWORD dwWrite;
char szPipeUpdate[200];
hFile = CreateFile(L"\\.\pipe\TestPipe", GENERIC_WRITE|GENERIC_READ,
                           0, NULL, OPEN_EXISTING,
                           0, NULL);

 strcpy(szPipeUpdate,"Sending some data from client to server!");
 if(hFile == INVALID_HANDLE_VALUE)
  { 
        DWORD dw = GetLastError();
        printf("CreateFile failed for Named Pipe clientn:" );
  }
  else
  {
      flg = WriteFile(hFile, szPipeUpdate, strlen(szPipeUpdate), &dwWrite, NULL);
      if (FALSE == flg)
      {
         printf("WriteFile failed for Named Pipe clientn");
      }
      else
      {
         printf("WriteFile succeeded for Named Pipe clientn");
      }
  }
  printf("Let's read!n");
  //Read the datas sent by the server
  BOOL fFinishRead = FALSE;
  do
    {
        char chResponse[200];
        DWORD cbResponse, cbRead;
        cbResponse = sizeof(chResponse);
        fFinishRead = ReadFile(
            hFile,                  // Handle of the pipe
            chResponse,             // Buffer to receive the reply
            cbResponse,             // Size of buffer in bytes
            &cbRead,                // Number of bytes read 
            NULL                    // Not overlapped 
            );
        if (!fFinishRead && ERROR_MORE_DATA != GetLastError())
        {
            DWORD  dwError = GetLastError();
            wprintf(L"ReadFile from pipe failed w/err 0x%08lxn", dwError);
            break;
        }
        std::cout << chResponse;
    } while (!fFinishRead); // Repeat loop if ERROR_MORE_DATA
 CloseHandle(hFile);