How to export TIN/Contours

I shared a similar question a moment ago but perhaps I did not explain correctly. We are testing the program a If I save a DWG including a TIN (which I have chosen to show as contours) it will not open (for example in ZWCAD) or will open as a PROXY under Civil 3D. What is the correct way/worflow to export a TIN so I can maximize the importing by other users of third party apps? Is there a way to directly export the TIN, the contours? When opening it under Civil it will show but as a whole block, so I cannot select a specific contour line and edit it…

Thanks!

Jose

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