/// <summary>
 /// Button method to EDIT Department
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void btnEditDepartment(object sender, RoutedEventArgs e)
 {
     if (cbDepartments.SelectedIndex > -1)
     {
         DeptWindow deptWindow = new DeptWindow(repository, this, cbDepartments.SelectedItem as Department);
         deptWindow.Show();
     }
 }
        /// <summary>
        /// Button method to ADD Department
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAddDepartment(object sender, RoutedEventArgs e)
        {
            DeptWindow deptWindow = new DeptWindow(repository, this);

            deptWindow.Show();
        }