[MSCE C#]如何设置图层的线宽

LevelHandle newLevel = dgnModel.GetDgnFile().GetLevelCache().CreateLevel(name);
                EditLevelHandle editLevelHandle = newLevel.GetEditHandle();
                RgbColorDef rgbColor1 = new RgbColorDef((byte)r, (byte)g, (byte)b);
                uint colorMap1 = DgnColorMap.CreateElementColor(rgbColor1, null, null, dgnFile);
                //设置图层颜色
                editLevelHandle.SetByLevelColor(new LevelDefinitionColor(colorMap1,dgnFile));
                //设置图层线形
                editLevelHandle.SetByLevelLineStyle(new LevelDefinitionLineStyle(7,null,dgnFile));

                dgnModel.GetDgnFile().GetLevelCache().Write();

在创建图层后，通过EditLevelHandle能设置图层的颜色和线形，哪个接口可以设置图层的线宽呢？