void LoadDoughnutChart(string doughnutChartName)
        {
            this.Title = doughnutChartName;

            doughnutChartFrame = new CGRect(this.View.Bounds.X,
                this.View.Bounds.Y + 66,
                this.View.Bounds.Width,
                this.View.Bounds.Height - 66 - 56);

            doughnut = new DoughnutChartView ();

            doughnut.control.Frame = doughnutChartFrame;

            this.View.Add (doughnut.control);
        }
        void LoadDoughnutChart(string doughnutChartName)
        {
            doughnutChartFrame = new CGRect(this.View.Bounds.X,
                this.View.Bounds.Y+80,
                this.View.Bounds.Width,
                this.View.Bounds.Height - 116);

            doughnut = new DoughnutChartView (chartTitle);

            doughnut.control.Frame = doughnutChartFrame;

            this.View.Add (doughnut.control);
        }