title: Importing Hotmail/Yahoo/Skype contacts in C#
body: <p>I am trying to build a social networking website of my own (like facebook). Facebook gives an option of importing contact lists from Hotmail/Yahoo/Gmail/Skype and others.</p>
  
  <p>I want to implement the same functionality. I have been able to do it successfully with GMAIL, thanks to their GOOGLE DATA API which is available online. But I have been unsuccessful for hotmail, yahoo and skype. I'm wondering, does there even exist such a way of doing this? I have found many codes online that claim to do it but none of them work. I just wish to know if I'm wasting time on something that can't be done.</p>
  
  <p>Any help would be appreciated.</p>