C# How to implement window resizing without flicker?

Question

C++ / C#

How to implement window size measurement with FormBorderStyle=None property without flicker?
The only way without full flickering that I found on the Internet is:

protected override CreateParams CreateParams {
  get {
    CreateParams parms = base.CreateParams;
    parms.Style |= 0x40000;
    return parms;
  }
}

but a rather thick frame appears, as well as a white stripe on top of which I could not get rid of.

Answer 1

Set the form's DoubleBuffered property to true