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

		XmlNode FindStartingNode (string virtualPath, out bool enableLocalization)
		{
			XmlDocument d = GetConfigDocument (virtualPath);
			XmlElement docElement = d.DocumentElement;

			if (String.Compare ("siteMap", docElement.Name, StringComparison.Ordinal) != 0)
				throw new ConfigurationErrorsException ("Top element must be 'siteMap'");
			
			XmlNode enloc = docElement.Attributes ["enableLocalization"];
			if (enloc != null && !String.IsNullOrEmpty (enloc.Value))
				enableLocalization = (bool) Convert.ChangeType (enloc.Value, typeof (bool));
			else
				enableLocalization = false;

			XmlNodeList childNodes = docElement.ChildNodes;
			XmlNode node = null;
			
			foreach (XmlNode child in childNodes) {
				if (String.Compare ("siteMapNode", child.Name, StringComparison.Ordinal) != 0)
					// Only <siteMapNode> is allowed at the top
					throw new ConfigurationErrorsException ("Only <siteMapNode> elements are allowed at the document top level.");
				
				if (node != null)
					// Only one <siteMapNode> is allowed at the top
					throw new ConfigurationErrorsException ("Only one <siteMapNode> element is allowed at the document top level.");
				
				node = child;
			}
			
			if (node == null)
				throw new ConfigurationErrorsException ("Missing <siteMapNode> element at the document top level.");
			
			return node;
		}