added methods to send to all in lobby

SharedClientServer/ClientServerUtil.cs

@@ -8,6 +8,15 @@ namespace SharedClientServer
 {
     class ClientServerUtil
     {
+        // creates a message array to send to the server or to clients
+        public byte[] createPayload(byte id, string payload)
+        {
+            byte[] stringAsBytes = Encoding.ASCII.GetBytes(payload);
+            byte[] res = new byte[stringAsBytes.Length + 1];
+            res[0] = id;
+            Array.Copy(stringAsBytes, 0, res, 1, stringAsBytes.Length);
+            return res;
+        }
 
     }
 }