[ADDITION] Added databinding to the chatbox function.

Tried to broadcast the message, doesn't work yet.

SharedClientServer/ClientServerUtil.cs

@@ -18,6 +18,5 @@ namespace SharedClientServer
             Array.Copy(stringAsBytes, 0, res, 1, stringAsBytes.Length);
             return res;
         }
-
     }
 }

SharedClientServer/User.cs

@@ -9,6 +9,7 @@ namespace SharedClientServer
         private string _username;
         private int _score;
         private bool _host;
+        private string _message;
 
         public User(string username, int score, bool host)
         {