Event Receiver get calendar Item Recurrence

Hi,

I created Event Receiver to Calendar ListItem, where in the ItemAdded function I programatically create new Calendar Item to the RootSite Calendar. My problem is, how van I add the newItem to Root site if the properties.listitem is recurrence?

I think the best way to create SPQuery to query List if properties.listItem["Recurrence"] == true, but I don't know which Field is the identity to the same recurring item.

Please help!

Thanks,

Mykie