title: How to post a message to friend's timeline in Unity3d
body: <p>I'm making a game with Unity3d and I have a problem when use FB.Feed()
  I read document of facebook and I saw:
  "Prompts a user to post a feed story. It can be posted to either his/her own timeline (if toId is blank, or set to the user's own Facebook user ID), or to that of one friend (if toID is set to the user ID of that friend)."</p>
  
  <pre><code>public static void Feed(
      string toId = "", 
      string link = "", 
      string linkName = "", 
      string linkCaption = "", 
      string linkDescription = "", 
      string picture = "", 
      string mediaSource = "", 
      string actionName = "", 
      string actionLink = "", 
      string reference = "",
      Dictionary&lt;string,string[]&gt; properties,
      FacebookDelegate callback = null
  )
  </code></pre>
  
  <p>and how can I post a message to any my friend's wall with this function?</p>