public void ScrollUpFromCenterYToTopOfElement(string id)
{
    _app.WaitForElement(id);
    var element = _app.Query(e => e.Id(id)).First().Rect;
    DragFromElementCenterToDestination(element, element.CenterX, element.Y);
}

public void ScrollDownFromCenterYToBottomOfElement(string id)
{
    _app.WaitForElement(id);
    var element = _app.Query(e => e.Id(id)).First().Rect;
    var bottomOfElement = element.Y + element.Height;
    DragFromElementCenterToDestination(element, element.CenterX, bottomOfElement);
}

private void DragFromElementCenterToDestination(AppRect rect, float destinationX, float destinationY)
{
    _app.DragCoordinates(
        rect.CenterX,
        rect.CenterY,
        destinationX,
        destinationY
    );
}