By holding a reference to it that is grounded to a GC root i.e. an an ownership chain to a local variable that will dispose of it. Also which can be used to in

By holding a reference to it that is grounded to a GC root i.e. an an ownership chain to a local variable that will dispose of it. Also which can be used to interrupt the background task. So the network connection, callback, etc., are not in a detached cycle. With the design you're describing -- without the ability to interrupt the background task -- I would bet you tend to get race conditions of one kind or another.