For those that don’t know how to import a dgn file into autocad or civil 3d the command is dgnimport or dgnattach. Here are some other helpful information about import dgn files and terms.
Micro station AutoCAD
Geometric Elements Geometric Objects
Text Elements Single-line Text
dgn sheet model dwg lauouts
styles objects, multiline, text ojects
I will get a little more in depth with this tomorrow.