private void FindButton_Click(object sender, RoutedEventArgs e) { string findProcessName = FindTextBox.Text; if (String.IsNullOrEmpty(findProcessName)) { MessageBox.Show("You didn't write process name"); } else { for (int i = 0; i < ProcessHandler.Items.Count; i++) { if (findProcessName.ToLower() == ((MyProcess)ProcessHandler.Items[i]).NameProcess.ToLower()) { ProcessHandler.SelectedItem = ProcessHandler.Items[i]; ProcessHandler.ScrollIntoView(ProcessHandler.Items[i]); ProcessHandler.Focus(); break; } } } }