Unet & Mono.Nat

Ok turns out that all I had to do was create a new c# file that was purely the following code:

 using Mono.Nat;
 public class punchthrough {
 
     public punchthrough(){
         NatUtility.DeviceFound += DeviceFound;
         NatUtility.DeviceLost += DeviceLost;
         NatUtility.StartDiscovery ();
     }
 
     private void DeviceFound(object sender, DeviceEventArgs args)
     {
         INatDevice device = args.Device;
         device.CreatePortMap(new Mapping(Protocol.Tcp, 2033, 2033));
         // on device found code
     }
     
     private void DeviceLost(object sender, DeviceEventArgs args)
     {
         INatDevice device = args.Device;
         device.DeletePortMap(new Mapping(Protocol.Tcp, 2033, 2033));
         // on device disconnect code
     }
 }
 

I sent the file to a few others and it appears to punch through fine on port 2033