private void logIn_Click(object sender, RoutedEventArgs e) { var context = DataEntitiesProvider.Provide(); var minVersionStr = context.GlobalSettings.FirstOrDefault(x => x.Name == "MinimumSupportedVersion"); if (minVersionStr != null) { var minVersion = Version.Parse(minVersionStr.Value); var thisVersion = Assembly.GetExecutingAssembly().GetName().Version; if (thisVersion < minVersion) { MessageBox.Show("This version is not supported any more because of database changes. Please get an update"); return; } } var lastLoggedIn = GetLastLoggedInUser(); var loginBox = new LoginWindow(lastLoggedIn); loginBox.Owner = this; loginBox.ShowDialog(); if (loginBox.UserId == 0) { MessageBox.Show("Invalid user/password"); return; } WriteLoggedInUserToRegistry(loginBox.UserName); _databaseCheckTimer.Start(); GlobalSettings.LoggedInUser = loginBox.UserName; LoggedInUserId = loginBox.UserId; UserLoginId = loginBox.UserLoginId; this.Title += " --- logged in as " + loginBox.UserName + " --- " + DataEntitiesProvider.Description(); ViewModel.IsLoggedIn = true; UserLoggedIn(this, new EventArgs()); }