System.Web.XmlSiteMapProvider.BuildSiteMapRecursive C# (CSharp) Method

		void BuildSiteMapRecursive (XmlNode xmlNode, SiteMapNode parent)
		{
			if (xmlNode.Name != "siteMapNode")
				throw new ConfigurationException ("incorrect element name", xmlNode);
			
			string attrValue = GetNonEmptyOptionalAttribute (xmlNode, "provider");
			if (attrValue != null) {
				SiteMapProvider provider = SiteMap.Providers [attrValue];
				if (provider == null)
					throw new ProviderException ("Provider with name [" + attrValue + "] was not found.");

				provider.ParentProvider = this;
				SiteMapNode providerRoot = provider.GetRootNodeCore();

				if (parent == null)
					root = providerRoot;
				else
					AddNodeNoCheck (providerRoot, parent);
				return;
			}

			attrValue = GetNonEmptyOptionalAttribute (xmlNode, "siteMapFile");
			if (attrValue != null) {
				var nvc = new NameValueCollection ();
				nvc.Add ("siteMapFile", attrValue);

				string description = GetOptionalAttribute (xmlNode, "description");
				if (!String.IsNullOrEmpty (description))
					nvc.Add ("description", description);

				string name = MapUrl (attrValue);				
				var provider = new XmlSiteMapProvider ();
				provider.Initialize (name, nvc);
				
				SiteMapNode providerRoot = provider.GetRootNodeCore ();
				if (parent == null)
					root = providerRoot;
				else
					AddNodeNoCheck (providerRoot, parent);
				return;
			}

			SiteMapNode curNode = ConvertToSiteMapNode (xmlNode);
			if (parent == null)
				root = curNode;
			else
				AddNodeNoCheck (curNode, parent);
			
			XmlNodeList childNodes = xmlNode.ChildNodes;
			if (childNodes == null || childNodes.Count < 1)
				return;
			
			foreach (XmlNode child in childNodes) {
				if (child.NodeType != XmlNodeType.Element)
					continue;

				BuildSiteMapRecursive (child, curNode);
			}
		}