protected override ToolStripDropDown CreateDefaultDropDown()
        {
            ToolStripDropDown baseDropDown = base.CreateDefaultDropDown();

            if (DesignMode)
            {
                return(baseDropDown);
            }

            MaterialContextMenuStrip defaultDropDown = new MaterialContextMenuStrip();

            defaultDropDown.Items.AddRange(baseDropDown.Items);

            return(defaultDropDown);
        }