title: Azure Notifications Hub. what second args of GetRegistrationsByTagAsync(string tag, int top) stands for?
body: <p>The <a href="http://msdn.microsoft.com/en-us/library/dn369602.aspx">documentation</a> says about <code>NotificationHubClient.GetRegistrationsByTagAsync(string tag, int top)</code> in Azure Push Notifications as below,</p>
  
  <blockquote>
    <p><em>top</em> (Int32) : The location where to get the registrations.</p>
  </blockquote>
  
  <p>But I have no idea what <em>top</em> or <em>location</em> stands for.<br>
  <a href="http://blog.valeriogheri.com/sending-push-notifications-to-android-devices-using-microsoft-azure-notificationhub-api">An example</a> I found use just <code>100</code> but no reason to use it.</p>