Cant drag and move a WPF Form

I am using a main window to hold pages (creating a navigation style program), and in the code behind of my main window, I inserted this…

protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
    base.OnMouseLeftButtonDown(e);

    // Begin dragging the window
    this.DragMove();
}

… and it works like a charm. This is with windowstyle=none. Its nice in the sense that you can click anywhere on the app and move it instead of just being limited to a top bar.