/// <summary>
 /// Search images.
 /// </summary>
 /// <param name="keyword">The keyword.</param>
 /// <param name="resultCount">The count of result itmes.</param>
 /// <param name="site">The specified domain. It will restrict the search to images within this domain.e.g., <c>photobucket.com</c>.</param>
 /// <returns>The result itmes.</returns>
 /// <remarks>Now, the max count of items Google given is <b>64</b>.</remarks>
 public IList <IImageResult> Search(string keyword, int resultCount, string site)
 {
     return(this.Search(
                keyword,
                resultCount,
                SafeLevel.GetDefault(),
                ImageSize.GetDefault(),
                Colorization.GetDefault(),
                ImageType.GetDefault(),
                ImageFileType.GetDefault(),
                site));
 }
 /// <summary>
 /// Begins an asynchronous request for searching images.
 /// </summary>
 /// <param name="keyword">The keyword.</param>
 /// <param name="resultCount">The count of result itmes.</param>
 /// <param name="site">The specified domain. It will restrict the search to images within this domain.e.g., <c>photobucket.com</c>.</param>
 /// <param name="callback">The <see cref="AsyncCallback"/> delegate.</param>
 /// <param name="state">An object containing state information for this asynchronous request.</param>
 /// <returns>An <see cref="IAsyncResult"/> that references the asynchronous request.</returns>
 public IAsyncResult BeginSearch(string keyword, int resultCount, string site,
                                 AsyncCallback callback,
                                 object state)
 {
     return(this.BeginSearch(
                keyword,
                resultCount,
                SafeLevel.GetDefault(),
                ImageSize.GetDefault(),
                Colorization.GetDefault(),
                ImageType.GetDefault(),
                ImageFileType.GetDefault(),
                site,
                callback,
                state));
 }