Determine when resolver update complete

Hello,

I'm using the sample resolver code to determine the return type of a method:

var context = new CSharpContextFactory().CreateContext(...);
var resultSet = context.Resolve();
...

I update the project resolver using the following call as the user updates the code within the syntax editor:

project.SourceFiles.QueueCode(...);

This correctly updates the resolver to reflect any changes the user has made (as seen in the mouse-over info and intelliprompt list). My problem is that I need to resolve the code immediately after calling ...QueueCode(...), and it appears that the QueueCode works on a background thread, so my context.Resolve happens before the resolver has been updated (and therefore fails).

How can I determine when the QueueCode / Resolver update has finished?

Thanks.