I am using facebook api to login through facebook in my web application but email is null. I am using code mentioned in below article
Now I have created app in facebook and here is screen shot

Code I am using 1st to connect to facebook
//FaceBookConnect.Authorize("user_photos,email", Request.Url.AbsoluteUri.Split('?')[0]);
FaceBookConnect.Authorize("email,public_profile,user_friends", Request.Url.AbsoluteUri.Split('?')[0]);
then when returned back
string code = Request.QueryString["code"];
if (!string.IsNullOrEmpty(code))
{
string data = FaceBookConnect.Fetch(code, "me");
FaceBookUser faceBookUser = new JavaScriptSerializer().Deserialize<FaceBookUser>(data);
faceBookUser.PictureUrl = string.Format("https://graph.facebook.com/{0}/picture", faceBookUser.Id);
password = faceBookUser.Id;
username = faceBookUser.Name;
string name = faceBookUser.UserName;
input_username_email = faceBookUser.Email;
Image = faceBookUser.PictureUrl;
MainLogin(Tusername: username, password: password, IsFB: true, Email: input_username_email);
}
but username and email is null always.
How can i get email ??