Left Mouse Click + Ctrl key event

Question

I need to handle an event for this combination of mouse left button  click + Ctrl key. Is it possible? I did not see it for the GraphicsLayer. I also have a ArcGISTiledMapServiceLayer in my control. I did not see anything for either in the documentation but I may be wrong.
thanks

LuisGarcia2 · Answer

Excellent! Thanks!!

OrlandoCarvajal · Answer

Use:        void featureLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs e)
        {
            if (Keyboard.Modifiers == ModifierKeys.Control)
            {
                ....