How to elegantly close DNS Server?

[Enovale]

Apologies if I'm simply just not fluent enough with .NET async to know this myself, but I can't figure out a nice way to make the server stop listening asynchronously besides just terminating the app. In my application I want the server running in another thread but that allows no way to stop the server.

What i've tried:
I'm using the ServerExample (mostly, it's insignificantly modified) in an async function.
I've messed around with GetAwaiter()s and Task.Run() and researched CancellationTokens but the former just doesnt seem to allow cancelling the task and the latter requires I edit the source code of the library.

What's the recommended (if any) way to do this?

[kapetan]

The DnsServer implements the IDisposable interface, so you can just call DnsServer.Dispose to termintate the server.