public static ToolStripMenuItem add_MenuItem(this ContextMenuStrip contextMenu, string text, Action <ToolStripMenuItem> onClick)
{
if (contextMenu.isNull())
{
return(null);
}
var menuItem = new ToolStripMenuItem {
Text = text
};
contextMenu.Items.Add(menuItem);
menuItem.Click += (sender, e) => O2Thread.mtaThread(() => onClick(menuItem));
return(menuItem);
}