Converting a dwg to a dgn file

I have been trying to convert a dwg file to a dgn file. I did it directly from Civil3D and the line work looks good, but the surface and the elevations are not showing. I tried to create a surface in Microstation from a LandXML file exported from Civil3D, but the surface does not look the same as in Civil3D. I also tried converting the contours to polylines for then recreate the surface and it did not worked on MicroStation either. I may be missing something or there is a better way to convert the files so I can see the surface and elevations. 

Thank you, 

Melissa Padilla