The group of the symbol variant. That is needed to add graphical placements.
public Group AsGroup {get;}
Property Value
Group of the symbol variant.
MDSymbolVariant symVar = sym.AddSymbolVariant(0);
Group grp = symVar.AsGroup;
Line lin = Line.Create(grp);
lin.StartPoint = new PointD(-50.0, 150.0);
lin.EndPoint = new PointD(-50.0, 50.0);