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Simply put, what is a good way to send the progress of some process back to a form from within a class outside the scope of the form?
EG: I have a Input object, a filepath is sent into the constructor of this object and it parses the file. I want to show the progress of reading in the lines of this file back to the user who is in a form outside the scope of the currently running method. Ultimately I will be displaying overall progress and per file progress.
The best approach here would be a BackgroundWorker. It has a specal event ReportProgress (that handles the Invoke logic for you).
It is an easy way to do multi-threading. Follow a good example when implementing the RunWorkerCompleted event.