Bug 2033

Review Pie Pen mode in Xamarin.iOS, it doesn't work fine. The code below shows the exactly problem: 
		public MainPage()
		{
			InitializeComponent();

			tChart1 = new ChartView();
			tChart1.Chart.Panning.Allow = ScrollModes.None;
			tChart1.Chart.Panel.Gradient.Visible = false;
			tChart1.Chart.Panel.Color = Color.White;

			tChart1.Chart.Walls.Back.Visible = false;
			tChart1.Chart.Header.Visible = false;
			tChart1.Chart.Legend.Visible = false;
			tChart1.Chart.Aspect.View3D = false;
			
			Steema.TeeChart.Styles.Pie pie1 = new Steema.TeeChart.Styles.Pie(tChart1.Chart);
			pie1.Add(81, Color.FromHex("#B9C4D8"));
			pie1.Add(1, Color.FromHex("#1D386D"));
			pie1.Add(10, Color.FromHex("#F5A623"));
			pie1.Add(5, Color.FromHex("#BBC3D3"));
			pie1.Add(3, Color.FromHex("#BBC3D3"));


			
			pie1.Marks.Visible = false;
			pie1.Pen.Color = Color.White;
			pie1.AutoPenColor = false;
			pie1.Circled = true; 
			pie1.Pen.Width = 15;


			tChart1.WidthRequest = 650;
			tChart1.HeightRequest = 350;

		
			Content = new StackLayout
			{
				Children =
									{
										tChart1
									},
				VerticalOptions = LayoutOptions.CenterAndExpand,
				HorizontalOptions = LayoutOptions.CenterAndExpand,
			};

		}