private void Page_Loaded(object sender, RoutedEventArgs e)
        {
            var orgs = DataManagement.RetrieveOrganizationChart();

            OrgCom.Items.Clear();
            if (orgs.Count > 0)
            {
                foreach (var item in orgs)
                {
                    OrgCom.Items.Add(item.Title);
                }
            }
            var positions = DataManagement.RetrievePositions();

            foreach (var item in positions)
            {
                var temp = new ComboBoxItem();
                temp.Content = item.PositionTitle;
                temp.Tag     = item.PositionId;
                PositionTxt.Items.Add(temp);
            }
            FNameTxt.Text             = "";
            LNameTxt.Text             = "";
            PositionTxt.Text          = "";
            OrgCom.SelectedIndex      = -1;
            PositionTxt.SelectedIndex = -1;
            FNameTxt.Focus();
            Grid.ItemsSource = null;
        }
 private void RefreshBtn_Click(object sender, RoutedEventArgs e)
 {
     FNameTxt.Text             = "";
     LNameTxt.Text             = "";
     PositionTxt.Text          = "";
     PositionTxt.SelectedIndex = -1;
     OrgCom.SelectedIndex      = -1;
     FNameTxt.Focus();
 }