title: Getting number of files in StorageFolder
body: <p>I was working with a Windows Phone 8.1(RT) application, I wanted to know how to get <strong>the number of files inside a StorageFolder</strong>. </p>
  
  <p>I know we can use <code>StorageFolder.GetFilesAsync()</code> and then check the count of this list returned.
  But since this method takes too long and returns all items is there more efficient method of getting this done?</p>