If a namespace in my project includes the same name as an external
reference, ReSharper will not show anything in the external references. This
is a really contrived example, but create a new class and set its namespace
to something like
public class Dummy
System. <--- oops
When I type System. I see two entries in the tooltips:
Company.Application.System.Stuff and System. It does not matter which of
these two items I select, ReSharper won't show anything other than
System.Stuff. If I press Esc to stop completion and then press C (e.g.
System.c), I see only cex and ctx in the completion list instead of the two
dozen or so items I'd expect to see.