private void AddToRequestsQueue()
 {
     while (true)
     {
         try
         {
             if (listener.IsListening)
             {
                 var context = listener.GetContext();
                 if (queueLength < QueueSize)
                 {
                     RequestsQueue.Enqueue(context);
                     Interlocked.Increment(ref queueLength);
                 }
                 else
                 {
                     var response = new StatusCode(429);  //429
                     response.Execute(context.Response);
                 }
             }
         }
         catch (ThreadAbortException)
         {
             return;
         }
         catch (Exception error)
         {
             Console.WriteLine(error.Message);
         }
     }
 }