Is it possible to send whole bytearray at once? JS

Hi. Currently I have client, that creates TcpClient and using TcpClient.Connect() creates a connection to server and finally NetworkStream using client.getStream();

 private function ThreadListener(){
 var client = new TcpClient();
 var port = 66948;
 
 try{
     client.Connect(IPEndPoint(IPAddress.Parse("127.0.0.1"), port));
     
     ns = client.GetStream();
             /*.
               .
               .*/
 }
 catch (InvOpEx : InvalidOperationException) {
     Debug.Log("TCP exception: " + InvOpEx.Message);
 }
       
 catch (SockEx : SocketException) {
     Debug.Log("Socket exception: " + SockEx.Message);
 }
 finally {
     if(ns != null)
           ns.Close();
     client.Close();
 }
 }

After NetworkStream is made, I can transfer byte arrays over it, one byte at a time using:

 var bytes : byte[] = System.Text.Encoding.ASCII.GetBytes("String to bytes");
 if(ns.CanWrite){
     ns.Write(bytes, 0, bytes.Length);
 }

However, when using Java server, it receives the String one byte at a time when using:

 Socket.getOutputStream();

I'm wondering, do I have to make edits to my server side or is there anyway to make NetworkStream send whole bytearray at once, instead of one byte at a time?