Parent call to Control.DrawToBitmap does not seem to respect clipping region set in child control

I have created a UserControl which simp开发者_如何学Cly defines a new GraphicsPath and sets that to be the Region of the control. Its primary use is to act as a backdrop for other controls so typically the only thing set on it is BackColor. When I call DrawToBitmap on the control's parent, the child control is drawn as a rectangle rather than getting clipped to region I expected. Am I missing something here?

Standard use of the control does not exhibit this problem.

Also, I need to be able to draw this control to an image while it is not currently shown on screen. I have seen some workarounds would could have worked had I not had this additional requirement.

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DrawToBitmap does not honor regions. But Graphics.CopyFromScreen does.

        Bitmap bitmap = new Bitmap(this.Width, this.Height);
        using (Graphics graphics = Graphics.FromImage(bitmap))
        {
            graphics.CopyFromScreen(this.Location, new Point(0, 0), this.Size);
        }