public void UpdateList()
{
List <Employee> employeesList = EmployeesController.GetInstance().GetEmployees();
employeesList.Sort((x, y) => x.TradePoint.Name.CompareTo(y.TradePoint.Name));
employees = new ObservableCollection <Employee>(employeesList);
EmployeesList.ItemsSource = employees;
EmployeesList.Items.Refresh();
EmployeesList.UpdateLayout();
}