private void Search() { SearchClientViewModel searchContentTemp = new SearchClientViewModel(); searchContentTemp.CollectionOfClients = new ObservableCollection <client>(); using (SubscriptionContext context = new SubscriptionContext()) { if (SelectedParameter == "Nazwa klienta") { //int i = Convert.ToInt32(SearchingPhrase); var result = (from c in context.clients where c.name == SearchingPhrase select c).FirstOrDefault(); client cli = (client)result; searchContentTemp.CollectionOfClients.Add(cli); //foreach (subscription s in result) //{ // CollectionOfClients.Add(s); //System.Windows.MessageBox.Show(s.registration_data.ToString() + s.tariff_id.ToString()); // } } else if (SelectedParameter == "Nr abonamentu") { } } SearchContent = searchContentTemp; }