MultiThread in C#

Infact you can't access UI controls accross the threads (as this is not thread safe operation). Rather, you can use the the specialized thread control (BackgroundWorkerThread) provided in DOTNET 2.0 to update controls on parent window from the secondary thread.This control is the right candidate to perform the background operations in a seperate thread and Update UI on calling window (Parent window).

I used this control in one of my projects for Import CSV utility. I had to import users from CSV file into database. Beside this basic functionality, there was a requirement to show a progress bar and some label controls to show the progress of import on parent form. So I created one form (Main thread) and used the BackgroundWorkerThread control (secondary thread) to execute the import code and update the UI controls on Main form. You can drag this control from the toolbox under the component tab on the required form

I hope you will like the idea.