public MainWindow()
{
InitializeComponent();
ClsFrame.Ent = new DriverDBEntities();
ClsFrame.FrmBody = FrmCenter;
FrmCenter.Navigate(new Auth());
}
private void BtnBack_Click(object sender, RoutedEventArgs e)
{
try
{
FrmCenter.GoBack();
}
catch
{
this.Close();
}
}