Xamarin: Quickly add or remove an item from Android device's gallery

MediaGalleryHelper.cs

using Android.Content;
using Android.Media;
using Android.Provider;
using Android.Util;
using Uri = Android.Net.Uri;

namespace Classes.Helpers
{

  /// <summary>
  /// Helper class to help sync your media with the device's gallery (so the videos
  /// the app creates appear immediately). The gallery is terrible at realising
  /// files have been added or removed, on its own.
  /// </summary>
  public static class MediaGalleryHelper
  {

    private const string TAG = "App"
    private static readonly Uri _rootUri;
    private static readonly ContentResolver _contentResolver;
    const string MEDIA_QUERY_STRING = MediaStore.MediaColumns.Data + "=?";

    static MediaGalleryHelper()
    {
      // note it's always the ExternalContentUri, we have no control over where MediaScanner.Scan puts the references, 
      // they always end up here. InternalContentUri appears to be used for system files only.
      _rootUri = MediaStore.Video.Media.ExternalContentUri; 
      _contentResolver = Android.App.Application.Context.ContentResolver;
    }

    /// <summary>
    /// Will add file to media gallery on the device, make sure the file name is fully qualified.
    /// It leaves it up to the device to determine the mime type. Note that this will always end up
    /// in the MediaStore's 'ExternalContentUri' section, regardless of where the file is actually 
    /// located (e.g. internal drive or removable SD card). This is done entirely by the device, 
    /// we have no control of this.
    /// </summary>
    /// <param name="fileName">Fully qualified file name to add to the gallery. </param>
    public static void AddFileToGallery(string fileName)
    {
      Log.Debug(TAG, "Adding {0} to the gallery", fileName);
      // note that you can pass an array of FQ file names too, but those files must exist or you
      // end up with empty gray placeholders in the gallery.
      MediaScannerConnection.ScanFile(Android.App.Application.Context, new string[] { fileName }, null, null);
    }

    /// <summary>
    /// Will delete a file from the media gallery on the device. Ensure the file name is fully qualified. 
    /// Note that if you call this method and the file still exists, IT WILL BE DELETED FROM THE DEVICE.
    /// </summary>
    /// <param name="fileName">Fully qualified file name to add to the gallery. </param>
    public static void RemoveFileFromGallery(string fileName)
    {
      Log.Debug(TAG, "Deleting {0} from the gallery", fileName);
      _contentResolver.Delete(_rootUri, MEDIA_QUERY_STRING, new string[] { fileName });
    }

  }
}