//============================================================
        //	PUBLIC METHODS
        //============================================================
        #region Fill(RssFeed resource)
        /// <summary>
        /// Modifies the <see cref="RssFeed"/> to match the data source.
        /// </summary>
        /// <param name="resource">The <see cref="RssFeed"/> to be filled.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
        public void Fill(RssFeed resource)
        {
            //------------------------------------------------------------
            //	Validate parameter
            //------------------------------------------------------------
            Guard.ArgumentNotNull(resource, "resource");

            //------------------------------------------------------------
            //	Create namespace resolver
            //------------------------------------------------------------
            XmlNamespaceManager manager = new XmlNamespaceManager(this.Navigator.NameTable);

            //------------------------------------------------------------
            //	Attempt to fill syndication resource
            //------------------------------------------------------------
            XPathNavigator feedNavigator = this.Navigator.SelectSingleNode("rss", manager);

            if (feedNavigator != null)
            {
                XPathNavigator channelNavigator = feedNavigator.SelectSingleNode("channel", manager);
                if (channelNavigator != null)
                {
                    Rss091SyndicationResourceAdapter.FillChannel(resource.Channel, channelNavigator, manager, this.Settings);
                }

                SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(feedNavigator, this.Settings);
                adapter.Fill(resource, manager);
            }
        }
        /// <summary>
        /// Initializes the supplied <see cref="RssChannel"/> using the specified <see cref="XPathNavigator"/> and <see cref="XmlNamespaceManager"/>.
        /// </summary>
        /// <param name="channel">The <see cref="RssChannel"/> to be filled.</param>
        /// <param name="navigator">The <see cref="XPathNavigator"/> used to navigate the channel XML data.</param>
        /// <param name="manager">The <see cref="XmlNamespaceManager"/> used to resolve XML namespace prefixes.</param>
        /// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> object used to configure the load operation.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="channel"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="navigator"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="manager"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
        private static void FillChannel(RssChannel channel, XPathNavigator navigator, XmlNamespaceManager manager, SyndicationResourceLoadSettings settings)
        {
            Guard.ArgumentNotNull(channel, "channel");
            Guard.ArgumentNotNull(navigator, "navigator");
            Guard.ArgumentNotNull(manager, "manager");
            Guard.ArgumentNotNull(settings, "settings");

            XPathNavigator descriptionNavigator = navigator.SelectSingleNode("description", manager);
            XPathNavigator linkNavigator        = navigator.SelectSingleNode("link", manager);
            XPathNavigator titleNavigator       = navigator.SelectSingleNode("title", manager);
            XPathNavigator languageNavigator    = navigator.SelectSingleNode("language", manager);

            if (descriptionNavigator != null && !String.IsNullOrEmpty(descriptionNavigator.Value))
            {
                channel.Description = descriptionNavigator.Value;
            }

            if (linkNavigator != null)
            {
                Uri link;
                if (Uri.TryCreate(linkNavigator.Value, UriKind.RelativeOrAbsolute, out link))
                {
                    channel.Link = link;
                }
            }

            if (titleNavigator != null && !String.IsNullOrEmpty(titleNavigator.Value))
            {
                channel.Title = titleNavigator.Value;
            }

            if (languageNavigator != null && !String.IsNullOrEmpty(languageNavigator.Value))
            {
                try
                {
                    CultureInfo language = new CultureInfo(languageNavigator.Value);
                    channel.Language = language;
                }
                catch (ArgumentException)
                {
                    System.Diagnostics.Trace.TraceWarning("Rss091SyndicationResourceAdapter unable to determine CultureInfo with a name of {0}.", languageNavigator.Value);
                }
            }

            XPathNavigator imageNavigator = navigator.SelectSingleNode("image", manager);

            if (imageNavigator != null)
            {
                channel.Image = new RssImage();
                Rss091SyndicationResourceAdapter.FillImage(channel.Image, imageNavigator, manager, settings);
            }

            Rss091SyndicationResourceAdapter.FillChannelOptionals(channel, navigator, manager, settings);

            Rss091SyndicationResourceAdapter.FillChannelCollections(channel, navigator, manager, settings);

            SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(navigator, settings);

            adapter.Fill(channel);
        }
        /// <summary>
        /// Initializes the supplied <see cref="RssChannel"/> optional entities using the specified <see cref="XPathNavigator"/> and <see cref="XmlNamespaceManager"/>.
        /// </summary>
        /// <param name="channel">The <see cref="RssChannel"/> to be filled.</param>
        /// <param name="navigator">The <see cref="XPathNavigator"/> used to navigate the channel XML data.</param>
        /// <param name="manager">The <see cref="XmlNamespaceManager"/> used to resolve XML namespace prefixes.</param>
        /// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> object used to configure the load operation.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="channel"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="navigator"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="manager"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
        private static void FillChannelOptionals(RssChannel channel, XPathNavigator navigator, XmlNamespaceManager manager, SyndicationResourceLoadSettings settings)
        {
            Guard.ArgumentNotNull(channel, "channel");
            Guard.ArgumentNotNull(navigator, "navigator");
            Guard.ArgumentNotNull(manager, "manager");
            Guard.ArgumentNotNull(settings, "settings");

            XPathNavigator copyrightNavigator      = navigator.SelectSingleNode("copyright", manager);
            XPathNavigator managingEditorNavigator = navigator.SelectSingleNode("managingEditor", manager);
            XPathNavigator webMasterNavigator      = navigator.SelectSingleNode("webMaster", manager);
            XPathNavigator ratingNavigator         = navigator.SelectSingleNode("rating", manager);
            XPathNavigator publicationNavigator    = navigator.SelectSingleNode("pubDate", manager);
            XPathNavigator lastBuildDateNavigator  = navigator.SelectSingleNode("lastBuildDate", manager);
            XPathNavigator textInputNavigator      = navigator.SelectSingleNode("textInput", manager);

            if (copyrightNavigator != null)
            {
                channel.Copyright = copyrightNavigator.Value;
            }

            if (managingEditorNavigator != null)
            {
                channel.ManagingEditor = managingEditorNavigator.Value;
            }

            if (webMasterNavigator != null)
            {
                channel.Webmaster = webMasterNavigator.Value;
            }

            if (ratingNavigator != null)
            {
                channel.Rating = ratingNavigator.Value;
            }

            if (publicationNavigator != null)
            {
                DateTime publicationDate;
                if (SyndicationDateTimeUtility.TryParseRfc822DateTime(publicationNavigator.Value, out publicationDate))
                {
                    channel.PublicationDate = publicationDate;
                }
            }

            if (lastBuildDateNavigator != null)
            {
                DateTime lastBuildDate;
                if (SyndicationDateTimeUtility.TryParseRfc822DateTime(lastBuildDateNavigator.Value, out lastBuildDate))
                {
                    channel.LastBuildDate = lastBuildDate;
                }
            }

            if (textInputNavigator != null)
            {
                channel.TextInput = new RssTextInput();
                Rss091SyndicationResourceAdapter.FillTextInput(channel.TextInput, textInputNavigator, manager, settings);
            }
        }
        /// <summary>
        /// Modifies the <see cref="ISyndicationResource"/> to match the data source.
        /// </summary>
        /// <param name="resource">The Really Simple Syndication (RSS) <see cref="ISyndicationResource"/> to be filled.</param>
        /// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
        private void FillRssResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
        {
            //------------------------------------------------------------
            //	Validate parameter
            //------------------------------------------------------------
            Guard.ArgumentNotNull(resource, "resource");
            Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");

            //------------------------------------------------------------
            //	Fill syndication resource using appropriate data adapter
            //------------------------------------------------------------
            RssFeed rssFeed = resource as RssFeed;

            if (resourceMetadata.Version == new Version("2.0"))
            {
                Rss20SyndicationResourceAdapter rss20Adapter = new Rss20SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss20Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("1.0"))
            {
                Rss10SyndicationResourceAdapter rss10Adapter = new Rss10SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss10Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.92"))
            {
                Rss092SyndicationResourceAdapter rss092Adapter = new Rss092SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss092Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.91"))
            {
                Rss091SyndicationResourceAdapter rss091Adapter = new Rss091SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss091Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.9"))
            {
                Rss090SyndicationResourceAdapter rss090Adapter = new Rss090SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss090Adapter.Fill(rssFeed);
            }
        }
        /// <summary>
        /// Modifies the <see cref="RssFeed"/> to match the data source.
        /// </summary>
        /// <param name="resource">The <see cref="RssFeed"/> to be filled.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
        public void Fill(RssFeed resource)
        {
            Guard.ArgumentNotNull(resource, "resource");

            XmlNamespaceManager manager = new XmlNamespaceManager(this.Navigator.NameTable);

            XPathNavigator feedNavigator = this.Navigator.SelectSingleNode("rss", manager);

            if (feedNavigator != null)
            {
                XPathNavigator channelNavigator = feedNavigator.SelectSingleNode("channel", manager);
                if (channelNavigator != null)
                {
                    Rss091SyndicationResourceAdapter.FillChannel(resource.Channel, channelNavigator, manager, this.Settings);
                }

                SyndicationExtensionAdapter adapter = new SyndicationExtensionAdapter(feedNavigator, this.Settings);
                adapter.Fill(resource, manager);
            }
        }
        /// <summary>
        /// Modifies the <see cref="ISyndicationResource"/> to match the data source.
        /// </summary>
        /// <param name="resource">The Really Simple Syndication (RSS) <see cref="ISyndicationResource"/> to be filled.</param>
        /// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
        private void FillRssResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
        {
            Guard.ArgumentNotNull(resource, "resource");
            Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");

            RssFeed rssFeed = resource as RssFeed;

            if (resourceMetadata.Version == new Version("2.0"))
            {
                Rss20SyndicationResourceAdapter rss20Adapter = new Rss20SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss20Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("1.0"))
            {
                Rss10SyndicationResourceAdapter rss10Adapter = new Rss10SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss10Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.92"))
            {
                Rss092SyndicationResourceAdapter rss092Adapter = new Rss092SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss092Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.91"))
            {
                Rss091SyndicationResourceAdapter rss091Adapter = new Rss091SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss091Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.9"))
            {
                Rss090SyndicationResourceAdapter rss090Adapter = new Rss090SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss090Adapter.Fill(rssFeed);
            }
        }
        /// <summary>
        /// Modifies the <see cref="ISyndicationResource"/> to match the data source.
        /// </summary>
        /// <param name="resource">The Really Simple Syndication (RSS) <see cref="ISyndicationResource"/> to be filled.</param>
        /// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
        /// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
        private void FillRssResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
        {
            //------------------------------------------------------------
            //	Validate parameter
            //------------------------------------------------------------
            Guard.ArgumentNotNull(resource, "resource");
            Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");

            //------------------------------------------------------------
            //	Fill syndication resource using appropriate data adapter
            //------------------------------------------------------------
            RssFeed rssFeed = resource as RssFeed;

            if (resourceMetadata.Version == new Version("2.0"))
            {
                Rss20SyndicationResourceAdapter rss20Adapter    = new Rss20SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss20Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("1.0"))
            {
                Rss10SyndicationResourceAdapter rss10Adapter    = new Rss10SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss10Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.92"))
            {
                Rss092SyndicationResourceAdapter rss092Adapter  = new Rss092SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss092Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.91"))
            {
                Rss091SyndicationResourceAdapter rss091Adapter  = new Rss091SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss091Adapter.Fill(rssFeed);
            }

            if (resourceMetadata.Version == new Version("0.9"))
            {
                Rss090SyndicationResourceAdapter rss090Adapter  = new Rss090SyndicationResourceAdapter(this.Navigator, this.Settings);
                rss090Adapter.Fill(rssFeed);
            }
        }