Problem on Thumbnail View(Preview) of DWG files.

Dear Friends,

   We need to display preview of select DWG files in dialog like as File Open Preview.
   We try two methods to show Preview, but both methods are collapsed the view like as below snap.

File Open Preview:
Refer Correct Snap
Sample Output Preview:
Problem Snap


Please note we are using 2 different method on sample both have occurs sample problem.
Following problem are occur on it.
1) Take many copy of same DWG in single preview.
2) Change direction of visible(Reverse visible).
3) Entity color was changed.
4) Some entity was not visible.

We need to create Preview as File->Open dialog Preview.
Please Refer Sample project.

We will wait for your replay.

With regards,
Vicky.

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