delay in reading data from hard disk

hello im building an application which requires retrieval of mp3 files from folders and show them in a treeview.but it's taking a lot of time and the screen freezes showing the following error-


"ContextSwitchDeadlock was detected
Message: The CLR has been unable to transition from COM context 0x216910 to COM context 0x216a80 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
"

how can this be overcome?i have tried to use backgroundworker but still unsure what to do.please help

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application which requires retrieval of mp3 files from folders and show them in a treeview

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So, how are you building the list?
In any case, does it appear only in Debug mode, or also if you lanch the exe?

Background worker could be a solution, but I was wondering what com or unmanaged code are you using (if any)

Have a look at this:
http://dotnetdud.blogspot.com/2009/0...tion-from.html

The odds are he's reading a bunch of MP3s from the main GUI thread which is blocking updates from occurring. He needs to do them in a background thread and post the updates the the UI to avoid making the UI non responsive.