how to integrate twitter and facebook in .net 4.5 (how to post into facebook and twitter from .net application)

Question

Hi i am TARUN. i am a trainee.. Hi have assigned a task to integrate facebook and twitter in .net.. 

I have no idea how to do.. Plz help me.. I searched on google but none of the article helps me..

I have tried the twitter api(twitterser) but it shows some errors..

my requirement is the user gives the username, passowrd  of facebook and the posting matter in a mutiline textbox.. when the user clicks on post button,the posting matter must be posted in his facebook profile

plz give me guidance...

my mail id is [email protected]

thanks in advance