FormStartPosition.CenterParent does not work

Question

In the following code, only the second method works for me (.NET 4.0). FormStartPosition.CenterParent does not center the child form over its parent. Why?

Answer 1

An old question, I know, but I had the same issue but for a different reason.

The Form I was opening had an overridden OnLoad method:

protected override void OnLoad(EventArgs e)
{
   //... etc.
}

but was not calling the base implementation as it must do:

protected override void OnLoad(EventArgs e)
{
   //... etc.
   base.OnLoad(e);
}

When overriding OnLoad(EventArgs) in a derived class, be sure to call the base class's OnLoad(EventArgs) method so that registered delegates receive the event.