How to modify PropertyGrid's internal controls?

PropertyGrid is a wonderful control. But this post is not to praise it; more to solve a practical problem.

PropertyGrid has an internal ToolStrip, among other controls. This ToolStrip provides sorting commands, but sometimes it's necessary to add other commands to it, like importing and exporting reflected data, settings, etc.

This ToolStrip is not publicly exposed, so one alternate solution is to set ToolbarVisible = false and provide a custom ToolStrip.

But wouldn't it be easier if the internal ToolStrip can be modified at will?

That can't be too hard. The following code should do:

public partial class MyPropertyGrid : System.Windows.Forms.PropertyGrid {
    public ToolStrip InternalToolStrip {
        get {
            foreach (Control ctrl in base.Controls) {
                if (ctrl is ToolStrip) {
                    return ctrl as ToolStrip;
                }
            }
            return null;
        }
    }
}

Now place MyPropertyGrid on a form, and check the Properties Window. There! Change InternalToolStrip any way seems fit.

Of course, this world ain't perfect. It's less desirable to edit this ToolStrip only from the Properties Window; plus, there's a bigger problem at runtime. They will be covered next.