Andwho.Windows.Forms.Metro.MetroToolStripRenderer.OnRenderMenuItemBackground C# (CSharp) Method

        protected override void OnRenderMenuItemBackground(ToolStripItemRenderEventArgs e)
        {
            Graphics g = e.Graphics;
            ToolStripItem item = e.Item;
            ToolStrip toolstrip = e.ToolStrip;

            if (toolstrip is ToolStrip)
            {
                g.SmoothingMode = SmoothingMode.HighQuality;
                //绘制选中项
                if (item.Enabled && item.Selected)
                {
                    item.ForeColor = Color.White;
                    Rectangle rect = new Rectangle(
                        item.ContentRectangle.X + 1,
                        item.ContentRectangle.Y,
                        item.ContentRectangle.Width - 1,
                        item.ContentRectangle.Height);
                    using (Brush brush = new SolidBrush(this._borderColor))
                    {
                        g.FillRectangle(brush, rect);
                    }
                }
                else
                {
                    item.ForeColor = Color.Black;
                }
            }
            else
            {
                base.OnRenderMenuItemBackground(e);
            }
        }