Form UI Freeezes even after using Backgroundworker when using Flickr.Net API

Question

Im trying to upload some images using the Flickr.net API.The Images are uploaded but the User Interface freezes.I have inserted the code for uploading in a Background worker

Answer 1

If you are doing something like:

while(worker.IsBusy)
{
}

to wait for it to finish, this will hang because it ties up the UI thread in the loop and since the background worker needs to invoke onto the UI thread to set the busy property safely there is a dead lock.