private void LoadData() // Load All Data For LoginPage { txt_UserName.Text = Registery.LoadDataOnRegistry(); string getConnectionString = ""; if (Registery.LoadConnectionString(getConnectionString)) { Btn_Login.IsEnabled = true; } else { Btn_Login.IsEnabled = false; if (MessageBox.Show("Connection Error ,are you repair connection string? ", "Error", MessageBoxButton.YesNo, MessageBoxImage.Error) == MessageBoxResult.Yes) { SettingsDB SettingWindow = new SettingsDB { }; SettingWindow.ShowDialog(); Btn_Login.IsEnabled = true; } } }