DoWork of BackgroundWorker is called twice when RunWorkerAsync is called once?

Question

I have create a backgroundworker in an class it works, but if i call and wait until the end run, call it for the second time it will do the same process twice

i thin

Answer 1

In my case, BackgroundWorker was running twice because in the constructor class of my form I declared the DoWork, ProgressChanged and RunWorkerCompleted event handlers, but it was already declared by Visual Studio 2013 in Designer part of this form class.

So, I just deleted my declarations and it worked fine.