public static EmployeeTripsWindow GetInstance(Employee empl)
{
if (State == null)
{
State = new EmployeeTripsWindow(empl);
}
if (State.employee.Id != empl.Id)
{
State = new EmployeeTripsWindow(empl);
}
return(State);
}
private void ShowTrips_Click(object sender, RoutedEventArgs e)
{
WorkingArea.Content = EmployeeTripsWindow.GetInstance(employee);
}