public override void Draw(RectangleF rect)
{
using(var context = UIGraphics.GetCurrentContext())
{
context.SetFillColor (UIColor.LightGray.CGColor);
context.FillRect (new RectangleF (0, 0, 320, 18 + headerHeight));
}
DrawDayLabels(rect);
if (_showHeader)
DrawMonthLabel(rect);
}