title: Birthday scope not showing in facebook login permission dialog
body: <p>I am using xamarin.forms PCL Project having two project android and IOS</p>
  
  <p>I have integrated facebook in my project.
  I pass three permission <code>public_profile</code>,<code>email</code>,<code>user_birthday</code> in facebook sdk. 
  when I try to login through facebook, Facebook permission dialog page open but it ask to accept only two permission <code>email</code>,<code>public_profile</code>, It not ask <code>user_birthday</code> permission</p>
  
  <p>Following is my code:</p>
  
  <pre><code>    public class FacebookLoginButtonRenderer : ButtonRenderer,IFacebook
      {
          private static Activity _activity;
  
          protected override void OnElementChanged(ElementChangedEventArgs&lt;Button&gt; e)
          {
              base.OnElementChanged(e);
  
              _activity = this.Context as Activity;
  
              if (this.Control != null)
              {
                  Android.Widget.Button button = this.Control;
                  button.SetOnClickListener(ButtonClickListener.Instance.Value);
              }
          }
  
          void IFacebook.Logout()
          {
              LoginManager.Instance.LogOut();
          }
  
          private class ButtonClickListener : Object, IOnClickListener
          {
              public static readonly Lazy&lt;ButtonClickListener&gt; Instance = new Lazy&lt;ButtonClickListener&gt;(() =&gt; new ButtonClickListener());
  
              public void OnClick(View v)
              {
                  LoginManager.Instance.LogInWithReadPermissions(_activity, new List&lt;string&gt; { "public_profile","email","user_birthday"});
              }
          }
      }
  
    FacebookClient fb = new FacebookClient(AccessToken);
     fb.GetTaskAsync("me?fields=id,email,first_name,last_name,gender,birthday").ContinueWith(t =&gt;   
              {
                  if (!t.IsFaulted)
                  {
  
                      var obj = (IDictionary&lt;string, object&gt;)t.Result;
  }
  });
  </code></pre>
  
  <p>In login permission dialog not asking for birthday as shown in below image</p>
  
  <p><a href="https://i.stack.imgur.com/0l8C7.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0l8C7.jpg" alt="enter image description here"></a></p>
  
  <p>Please suggest how to solve this</p>
  
  <p>Thanks in advance</p>