Q:

Facebook Birthday field empty with GraphApi ASP.NET

I'm running into a strange problem accessing to User birthday from my site. 
The Facebook App is configured to have Birthday access:

From Server Side I get the Token using my AppId & AppSecret and then I call Facebook with:
https://graph.facebook.com/[USER ID]?fields=id,birthday,email,first_name,last_name&access_token=[MY TOKEN HERE]

As response I get all the Fields I'm interested in (email, first name, last name etc) except for BIRTHDAY. 
In the App configuration the Birthday field is approved:

If I call it from the facebook console with the App Token:

A:

As suggested by Facebook support, this is NOT working by design. 
I was using the "App Token" to access to the personal information instead of the user token.  Using the user token everything worked like a charm. 
In few words: to access user info, use the user token.