TcpListenerAndTcpClient.cs

TcpListener listener = new TcpListener(IPAddress.Any, 55);
listener.Start();
TcpClient client = await listener.AcceptTcpClientAsync();
byte[] request;
using (NetworkStream ns = client.GetStream())
{
  using (MemoryStream ms = new MemoryStream())
  {
    int i;
    int bufferSize = 1024 * 2;
    byte[] buffer = new byte[bufferSize];
    while ((i = ns.Read(buffer, 0, buffer.Length)) != 0)
    {
      await ms.WriteAsync(buffer, 0, i);
      buffer = new Byte[bufferSize];
    }
    
    request = ms.ToArray();
  }
}
ProcessClientRequest(request);