title: UWP GetFilesAsync
body: <p>I'm trying to get all the "*.csv" files in the LocalState folder.  and get the following error. </p>
  
  <p>System.ArgumentException: 'The parameter is incorrect.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>        StorageFolder appInstalledFolder = ApplicationData.Current.LocalFolder;
          StorageFolder assets = await appInstalledFolder.GetFolderAsync("*.csv");
          var files = await assets.GetFilesAsync();
  </code></pre>