Facebook SDK FQL: Getting profile URL?

Question

I am using fql from facebook and querying user table to get profile_url

string facebook_info = Convert.ToString(FacebookAppExtensions.Query(app, "**SELECT 
                       profile_url from user where uid=" + facebook_ID**));
facebook_info = facebook_info.Substring(17);
char[] charsToTrim1 = { '}', ']', ' ', '"' };
facebook_info = facebook_info.TrimEnd(charsToTrim1);

The problem is that for some users the URL works while for other users, facebook says "UNKNOWN" page, is this a bug?

Thanks Behrouz

Answer 1

no need to query: http://www.facebook.com/profile.php?id=UID