private void toolStripButtonArrow_Click(object sender, EventArgs e) { if (toolStripButtonArrow.Checked) { if (MasterPane.CustomObjectsManager.IsBuildingObject) {// Already building. ((ToolStripButton)(sender)).Checked = false; return; } ArrowObject arrow = new ArrowObject("arrow"); arrow.Pen = new Pen(DrawingColor); arrow.Brush = new SolidBrush(DrawingColor); MasterPane.CustomObjectsManager.BuildDynamicObject(arrow); } else { MasterPane.CustomObjectsManager.StopBuildingDynamicObject(); } }