C# Winform ProgressBar and BackgroundWorker

One problem is that you’re sleeping for 30 seconds. Normally you’d call ReportProgress at various points within your long-running task. So to demonstrate this, you might want to change your code to sleep for 1 second, but 30 times – calling ReportProgress each time it finishes a sleep.

Another problem is that you’re showing your ProgressForm from the background thread. You should start it in the UI thread, but hook the background worker’s ProgressChanged event to it. Then when the background worker reports progress, the progress form will be updated.

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