C#: How to make a form remember its Bounds and WindowState (Taking dual monitor setups into account)

Question

I have made a class which a form can inherit from and it handles form Location, Size and State. And it works nicely. Except for one thing:

When you maximize the app

Answer 1

There are a few issues with the above solution.

On multiple screens as well as if the restore screen is smaller.

It should use Contains(...), rather than IntersectsWith as the control part of the form might otherwise be outside the screen-area.

I will suggest something along these lines

bool TestBounds(Rectangle R) {
    if (MdiParent == null) return Screen.AllScreens.Any(ø => ø.Bounds.Contains(R)); // If we don't have an MdiParent, make sure we are entirely on a screen
    var c = MdiParent.Controls.OfType().FirstOrDefault(); // If we do, make sure we are visible within the MdiClient area
    return (c != null && c.ClientRectangle.Contains(R));
}

and used like this. (Note that I let Windows handle it if the saved values does not work)

bool BoundsOK=TestBounds(myBounds);
if (!BoundsOK) {
    myBounds.Location = new Point(8,8); // then try (8,8) , to at least keep the size, if other monitor not currently present, or current is lesser
    BoundsOK = TestBounds(myBounds);
}
if (BoundsOK) { //Only change if acceptable, otherwise let Windows handle it
    StartPosition = FormStartPosition.Manual;
    Bounds = myBounds;
    WindowState = Enum.IsDefined(typeof(FormWindowState), myWindowState) ? (FormWindowState)myWindowState : FormWindowState.Normal;
}