WPF WindowStartupLocation=“CenterOwner” not really center, and pops all over, why?

Question

Well this question and this question are similar but no answers that work. In fact I was hoping WindowStartupLocation=CenterOwner would work...it doesn\'t. It seems to cent

Answer 1

Something else that can cause this is setting DataContext after InitializeComponent() is called.

If you have code-behind like this:

    public CustomWindow(CustomViewModel viewModel)
    {
        InitializeComponent();
        DataContext = viewModel;
    }

Change it to:

    public CustomWindow(CustomViewModel viewModel)
    {
        DataContext = viewModel;
        InitializeComponent();
    }