Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
TypedValue[] values = { new TypedValue((int)DxfCode.Color,1),
new TypedValue((int)DxfCode.XCoordinate,new Point3d(0,0,0)),
new TypedValue((int)DxfCode.XCoordinate,new Point3d(100,100,0))
};
ResultBuffer buffer = new ResultBuffer(values);
ed.DrawVectors(buffer, Matrix3d.Identity);
No Effect!!