c# - Facebook App Invite for Xamarin -

i developing application using xamarin traditional approach 3 platforms : android, ios , windows phone 8

for 3 platform achieve functionality of app invite facebook.

but find feasibility android , ios native application support.

how achieve this?

i have tried following approaches

need convert facebook sdk of ios , android support xamarin creating wrapper of c#. again not going support windows phone
for .net library tried : http://facebooksdk.net/docs/ again not find app invite feature through it.

what should solution.

requirement : require feature because invite friends join application.

a bit old, maybe can - take @ thread:

WIKI