Performance issue with WPF [closed]

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I am facing a strange issue that throws following exception.

The CLR has been unable to transition from COM context 0x22f3090 to COM context 0x22f32e0 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.

So, I am keen to know its possible reasons in wpf. As of now, I am performing an operation which is causing this So, I put stop watch and check the time of my code but my code is not taking time to execute rather it is taken by run time framework. I know probably I am doing something wrong with my code. So, I am keen to know the possible reason for this kind of bug.. currently Invoking that operation is taking more than 5 minutes and even operation is very simple

Answer 1

After doing lots of efforts, I came to know that I was making a silly mistake by putting a data grid inside a scroll bar, which disables the by default visualization(UI and Data), and It was trying to load all the objects in the grid regardless of their need,

So, good note:

Never ever place scroll bar outside a **grid.

<ScrollViewer>
  <DataGrid>
....
  </DataGrid>
</ScrollViewer>**

Never do this.