Why can't I cast an int to a string within this ternary operation

Question

I left some code out for brevity...

int id = Convert.ToInt32(Page.RouteData.Values[\"id\"]);
var q = db.Categories.SingleOrDefault(x => x.categoryID == id);

         


        

Answer 1

Because your are trying to make the ternary operator evaluate to either an int (0) or a string (id.ToString()). Replace the 0 with "0".