Pause screen refresh during drawing changes

I'm writing a Windows Form app to automate populating data on the drawing in DraftSight.

When my code is adding rows to a table it can take awhile to put all the data on the drawing. When I set the DraftSight visible property to false to hide the app, my Windows app runs faster. Is there a way to pause refreshing the drawing on-screen while my code runs and keep DraftSight visible, and then refresh the drawing once the code is finished running?