private void displayMinYearPicker()
        {
            Section section = new Section();

              List<int> years = new List<int>();
              for (int i=mCacheMinYear; i<mSelectedMaxYear; i++)
              {
            years.Add(i);
            section.Add(new RadioElement(i.ToString()));
              }

              var viewController = new DialogViewController (
            new RootElement ("Select minimum date", new  RadioGroup (0)){
            section
              }, true);

              viewController.OnSelection += (NSIndexPath obj) => {
            mSelectedMinYear = years[obj.Item];
            InvokeOnMainThread( () => {
              ButtonYearMin.SetTitle(mSelectedMinYear.ToString(), UIControlState.Normal);
              viewController.DismissViewController(true, null);
            });
              };
              NavigationController.PushViewController (viewController, true);
        }