I have the follow code but it is awkward. How could I better structure it? Do I have to make my consuming class implement IDisposable and conditionally construct the network acc
By having your class implement IDisposable, the dispose method is called only when using the "using" statement. Otherwise you have to explicitly call dispose.
Typically IDisposable is implemented by objects that manage memory consumption outside of the garbage collector (like using unmanaged code for example). It provides a way to clean up any consumed memory.
So long as your NetworkAccess class implements IDisposable, the dispose method will get called as soon as the scope of the using statement is complete. If it is managed code, then no need to dispose of it. Just let the garbage collector do its work.