title: ASP.NET MVC Invitation sysyem
body: <p>I need to support invitation in my <a href="http://en.wikipedia.org/wiki/ASP.NET_MVC_Framework" rel="nofollow noreferrer">ASP.NET MVC</a> based site, so the members can invite friends to join.</p>
  
  <p>Does any ready component exist that can do this for me instead of starting from scratch?</p>