void FormatChooser()
        {
            //Setup the picker and model
            PickerModel model = new PickerModel (this.View);
            model.PickerChanged += (sender, e) =>
            {
                this.comboBoxFormats.Text = e.SelectedValue;

            };

            //UIPickerView
            UIPickerView picker = new UIPickerView ();
            picker.ShowSelectionIndicator = true;
            picker.Model = model;

            //Tell the textbox to use the picker for input
            comboBoxFormats.InputView = picker;
            comboBoxFormats.InputAccessoryView = datePickerDismissalView(picker,comboBoxFormats);
        }