appending current Row ID

I am trying to append the current row ID to a string I am trying toinsert via a sproc. I have retrieved the @.@.Identity and I am passing itinto a class with a parameter and calling it using:

Listings.UpdateDB AddNewListing = new Listings.UpdateDB();

AddNewListing.InsertListing (Bathrooms.Text, Bedrooms.Text,Description.Text, Features.ToString(), Address.Text, Price.Text, FN);

I would like to add the current row ID to "FN" like:

Listings.UpdateDB AddNewListing = new Listings.UpdateDB();

AddNewListing.InsertListing(Bathrooms.Text, Bedrooms.Text,Description.Text, Features.ToString(), Address.Text, Price.Text, FN +ID);

Thanks in advance,
Justin.

Why wouldn't your UpdateDB() return the new ID (or set a property)?