RE: [CONNECT .NET Addin] Set color, weight, and linestyle "ByLevel"

Bentley.MstnPlatformNET is a namespace reference specific to the MicroStation (Mstn) executable who's primary dependent dynamic library to ustation.dll. MicroStation add-ins projects simply reference ustation.dll to obtain a number of MicroStation product-specific common namespace and runtime library code and functionality required. You can verify where a namespace maps using the Microsoft Object Browser (Ctrl+Alt+J), search for a namespace name or item noting the "Member of" that you can click through to identify the underlying full path and file name of the related library reference.

HTH,
Bob