//private void Hostlist_Click(object sender, RoutedEventArgs e)
        //{
        //    m_navigationService = this.NavigationService;
        //    var ManagerPageGetHostList = new ManagerListsPage(); //create your new form.
        //    this.NavigationService.Navigate(ManagerPageGetHostList);
        //}

        private void OccupancyButtom_Click(object sender, RoutedEventArgs e)
        {
            bool flag = false;
            List <HostingUnit> mylist = bl.GetHostingUnitsList();

            foreach (var item in mylist)
            {
                if (UnitTextBox.Text == item.HostingUnitName)
                {
                    flag = true;
                }
            }
            if (flag)
            {
                float temp = bl.GetAnnualBusyPercentage(UnitTextBox.Text);
                answerUnitOccupancyTextBlock.Text = "The occupancy of this unit is: " + temp;
            }
            else
            {
                string titel = "Oops";
                string err   = "Cannot find a HostingUnit with this name.";
                MessageBox.Show(err, titel);
            }
        }