I sure can't replicate the issue in that demo page, but as you had the opportunity to see in my code sample, it's as barebones as it can get, and still I'm getting the Exception consistently.Can't exactly figure out what's happening, but it seems to have something to do with how the file is persisted. What's odd about it is I've only managed to ...

Hello,   I just did as you suggested and created a sample web site to illustrate the problem, and managed to see an exception that gets thrown (in the original project it somehow is being gobbled up somewhere): The process cannot access the file ...

On the FileUploaded event I'm doing some validation (checking file type and whatnot), and in case there's an error, I want to completely dispose of the file that was uploaded. To achieve this I'm calling .ClearFile() and then returning from the event handler without further action.That doesn't seem to be enough, as I'm faced with 2 ...

I was getting the same error and it was indeed gone after I forced the control to use Flash: uploader.UploadType = UploadType.Flash; My question now is this:What happens if the user doesn't have Flash installed? Does it fall back to Silverlight? Or does it simply fail?