/// <summary>
 /// Gets the URL for a thumbnail with the specified size.
 /// </summary>
 /// <param name="vimeoId">The ID of the video.</param>
 /// <param name="size">The size of the desired thumbnail.</param>
 public static string GetVimeoThumbnail(this string vimeoId, VimeoThumbnail size)
 {
     VimeoVideo video = VimeoHelpers.GetCachedVideoById(vimeoId);
     if (video == null) return null;
     switch (size) {
         case VimeoThumbnail.Small:
             return video.ThumbnailSmall;
         case VimeoThumbnail.Medium:
             return video.ThumbnailMedium;
         default:
             return video.ThumbnailLarge;
     }
 }
        /// <summary>
        /// Gets the URL for a thumbnail with the specified size.
        /// </summary>
        /// <param name="vimeoId">The ID of the video.</param>
        /// <param name="size">The size of the desired thumbnail.</param>
        public static string GetVimeoThumbnail(this string vimeoId, VimeoThumbnail size)
        {
            VimeoVideo video = VimeoHelpers.GetCachedVideoById(vimeoId);

            if (video == null)
            {
                return(null);
            }
            switch (size)
            {
            case VimeoThumbnail.Small:
                return(video.ThumbnailSmall);

            case VimeoThumbnail.Medium:
                return(video.ThumbnailMedium);

            default:
                return(video.ThumbnailLarge);
            }
        }
 /// <summary>
 /// Gets the URL for a thumbnail with the specified size.
 /// </summary>
 /// <param name="vimeoId">The ID of the video.</param>
 /// <param name="size">The size of the desired thumbnail.</param>
 public static string GetVimeoThumbnail(this int vimeoId, VimeoThumbnail size)
 {
     return(GetVimeoThumbnail(vimeoId + "", size));
 }
 /// <summary>
 /// Gets the URL for a thumbnail with the specified size.
 /// </summary>
 /// <param name="vimeoId">The ID of the video.</param>
 /// <param name="size">The size of the desired thumbnail.</param>
 public static string GetVimeoThumbnail(this int vimeoId, VimeoThumbnail size)
 {
     return GetVimeoThumbnail(vimeoId + "", size);
 }