Toolstrip border removal

private void toolStrip1_Paint(object sender, PaintEventArgs e)
    {
    
      if ((sender as ToolStrip).RenderMode == ToolStripRenderMode.System)
      {
    
        Rectangle rect = new Rectangle(0, 0, this.toolStrip1.Width, this.toolStrip1.Height - 2);
        e.Graphics.SetClip(rect);
      }
    }