public Login() { InitializeComponent(); Lang.ItemsSource = new List <string> { "English", "עברית" }; if (ContainsEnglish(username.Text)) { Lang.SelectedIndex = 0; } else { Lang.SelectedIndex = 1; } try { bl = SingletonFactoryBL.GetBL(); } catch (BlFileErrorException) { MessageBox.Show("There was a problem with the files!", "Error!", MessageBoxButton.OK, MessageBoxImage.Error); Exit_Click(null, null); } bl.ActivateExpiredOrdersThread(); }