如何在Xamarin表单中更改DatePicker Ok和Cancel按钮文本？

using Android.App;
using Android.Content;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(DatePicker), typeof(CustomDatePickerRenderer))]
namespace YourNamespace
{
    public class CustomDatePickerRenderer : DatePickerRenderer
    {
        public CustomDatePickerRenderer(Context context) : base(context)
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
        {
            base.OnElementChanged(e);

            if (Control != null && e.NewElement != null)
            {
                Control.Click += Control_Click;
            }
        }

        private void Control_Click(object sender, EventArgs e)
        {
            var dialog = new DatePickerDialog(Context, (o, args) =>
            {
                ((IElementController)Element).SetValueFromRenderer(DatePicker.DateProperty, args.Date);
                Control.Text = args.Date.ToString("d");
            }, Element.Date.Year, Element.Date.Month - 1, Element.Date.Day);

            dialog.SetButton((int)DialogButtonType.Positive, "自定义OK按钮文本", (s, a) =>
            {
                Element.Date = dialog.DatePicker.DateTime;
                Element.Format = "d";
                Control.Text = Element.Date.ToString(Element.Format);
            });

            dialog.SetButton((int)DialogButtonType.Negative, "自定义Cancel按钮文本", (s, a) =>
            {
                Element.Unfocus();
            });

            dialog.Show();
        }
    }
}