Though there is not a direct API to import a Step file in to AutoCAD drawing unlike Body.AcisIn
, we use Editor.Command
API to invoke Import command
public void StepIn() { Document doc = Application.DocumentManager.MdiActiveDocument; Editor ed = doc.Editor; ed.Command(new object[] { "_.IMPORT", "D:\\Work\\CADFiles\\Scafolf_Bracket_Asy.stp"}); }