C# TcpClient - Subsequent calls to StreamWriter only write the first one

Question

I have a TCP connection and a StreamWriter.

public void SendData(string data, TcpClient client)
{
    StreamWriter writer = new StreamWriter(client.GetStream());
    writer.WriteLine(data);
    writer.Flush();
}

When I call SendData() subsequently like this

SendData("hi", client);
SendData("how are you", client);
SendData("?", client);

the client only receives the first line. I added a Thread.Sleep(100) to the SendData() method like this:

public void SendData(string data, TcpClient client)
{
    StreamWriter writer = new StreamWriter(client.GetStream());
    writer.WriteLine(data);
    writer.Flush();
    Thread.Sleep(100);
}

The second case works perfectly fine. Do you think my solution is acceptable or should i try to change the client? Do you have any experience or ideas about the origin of this problem?

Answer 1

The client is listening in Unity in a function called Update(), which is being called every frame. If you send twice the second data will be sent between two frames and can't be received. The thread.sleep is necessary.