Make WPF window draggable, no matter what element is clicked

Question

My question is 2 fold, and I am hoping there are easier solutions to both provided by WPF rather than the standard solutions from WinForms (which Christophe

Answer 1

private void Window_MouseDown(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left)
    this.DragMove();
}

Is throwing an exception in some cases (i.e. if on the window you also have a clickable image that when clicked opens a message box. When you exit from message box you will get error) It is safer to use

private void Window_MouseDown(object sender, MouseButtonEventArgs e)
{
if (Mouse.LeftButton == MouseButtonState.Pressed)
            this.DragMove();
}

So you are sure that left button is pressed at that moment.