How do update the UI in a generic way from other threads/delegates?

I have created psedo code of what I would like to achieve. Inside of the SomeBLL().Perf开发者_如何学CormBeginWork() threads will be created and maintained to do work. Using dot.net 4.0, what would be the best way to put this processing into an non-UI thread and still allow the assigned delegates to fire and update the UI in both a windows and web application without code modifications?

public class SomeBLL : BaseAsynWorker, IAsyncWorker
{
...makes threads and does work (if events are assigned then call them)
}

On a web page

SomeBLL sm=new SomeBLL();
sm.OnBeginWork+=ProcessUIUpdate;
sm.OnProgressUpdate+=ProcessUIUpdate;
sm.OnEndWork+=ProcessUIUpdate;
sm.OnHardError+=ProcessHardError;
SomeThreadClass.Spawn(sm.PerformBeginWork())

In a non UI process

SomeBLL sm=new SomeBLL();
sm.PerformBeginWork();

You're looking for the SynchronizationContext class.