Windows Forms: using BackgroundImage slows down drawing of the Form's controls

Question

I have a Windows Form (C# .NET 3.5) with a number of buttons and other controls on it, all assigned to a topmost Panel which spans the whole Form. For example, the hierarchy

Answer 1

I solved same problem using PictureBox. Just add PictureBox to your container, choose "Dock it in parent container" (or property Dock = Fill) and set it's Image. It will looks just like BackGroundImage of the parent control.