private void button_Click(object sender, RoutedEventArgs e) { User User = Treatments.CreateSession(); if (!string.IsNullOrEmpty(PassBox.Password)) { bool CorrectCredentials = Treatments.CheckCredentials(PassBox.Password, User); if (CorrectCredentials) { MainMenu Menu = new MainMenu(); Menu.Show(); this.Close(); } else { ErrorTBlck.Text = "Error: Wrong Password"; } } else { ErrorTBlck.Text = "Error: No Password typed."; } }