How do I display progress during a busy loop?

by

Move the work to a BackgroundWorker and use the ReportProgress method.

for (i = 0; i < count; i++)
{
    ... do analysis ...
    worker.ReportProgress((100 * i) / count);
}

private void MyWorker_ProgressChanged(object sender,
    ProgressChangedEventArgs e)
{
    taskProgressBar.Value = Math.Min(e.ProgressPercentage, 100);
}

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