ReaderLibrary.MyTag.GetFrequency C# (CSharp) Method

        public string GetFrequency()
        {
            return frequency;
        }

 // Helper method to connect Reader to MainForm
 public void HandleTagReceived(MyTag tag)
 {
     if (tag == null)
     {
         // todo - some gui display thing
         //AppendToMainTextBox("No Tags Seen");
     }
     else if (IsInventoryRunning())  // if reader is running
     {
         handleTags.HandleTagReceived(tag);
         channel_index = Convert.ToInt32(tag.GetFrequency());
         if (channel_index == last_channel_index)
         {
             tagInfo.rssi[channel_index - 1] = tagInfo.rssi[channel_index - 1] + Convert.ToInt32(tag.GetRSSI());
             channel_counter = channel_counter + 1;
         }
         else
         {
             if (channel_counter != 0)
             {
                 tagInfo.rssi[last_channel_index - 1] = tagInfo.rssi[last_channel_index - 1] / channel_counter;
                 tagInfo.rssi[channel_index - 1]      = Convert.ToInt32(tag.GetRSSI());
                 channel_counter    = 1;
                 last_channel_index = channel_index;
             }
             else
             {
                 tagInfo.rssi[channel_index - 1] = Convert.ToInt32(tag.GetRSSI());
                 channel_counter    = 1;
                 last_channel_index = channel_index;
             }
         }
     }
 }