WPF XMAL trigger from button to change combo box item color.

You can do it in code behind. i am not sure how to do using trigger .


 private void btn_Click(object sender, RoutedEventArgs e)
        {
          
            ItemCollection ic = txtTitle.Items; 
            foreach (ComboBoxItem cbi in ic) 
            { 
               if (cbi.Content.ToString()=="Item3" ||cbi.Content.ToString()=="Item4")
                cbi.Background = new SolidColorBrush(Color.FromArgb(255, 255, 182, 193)); 
            } 
       
        }