protected void OnButtonAddDistrictClicked(object sender, EventArgs e)
        {
            var district = new ScheduleRestrictedDistrict();

            observableRestrictedDistricts.Add(district);
            UpdateCurrentDistrict();
        }
        void UpdateCurrentDistrict()
        {
            currentDistrict = ytreeDistricts.GetSelectedObject() as ScheduleRestrictedDistrict;

            if (currentDistrict != null)
            {
                btnMonday.Click();
            }

            if (currentDistrict != null && currentDistrict.DistrictBorder != null)
            {
                currentBorderVertice = GetCurrentBorderVertice();
            }
            else
            {
                currentBorderVertice = new List <PointLatLng>();
            }

            ShowBorderVertice(currentBorderVertice);
            ControlsAccessibility();
        }