protected override void Rewrite(string requestedPath, System.Web.HttpApplication app){// log information to the Trace object.app.Context.Trace.Write("ModuleRewriter", "Entering ModuleRewriter");// get the configuration rulesRewriterRuleCollection rules = RewriterConfiguration.GetConfig().Rules;// iterate through each rule...for(int i = 0; i < rules.Count; i++){// get the pattern to look for, and Resolve the Url (convert ~ into the appropriate directory)string lookFor = "^" + RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, rules[i].LookFor) + "$";// Create a regex (note that IgnoreCase is set...)Regex re = new Regex(lookFor, RegexOptions.IgnoreCase);// See if a match is foundif (re.IsMatch(requestedPath)){// match found - do any replacement neededstring sendToUrl = RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, re.Replace(requestedPath, rules[i].SendTo));// log rewriting information to the Trace objectapp.Context.Trace.Write("ModuleRewriter", "Rewriting URL to " + sendToUrl);// Rewrite the URL
                    RewriterUtils.RewriteUrl(app.Context, sendToUrl);break;        // exit the for loop
                }}// Log information to the Trace objectapp.Context.Trace.Write("ModuleRewriter", "Exiting ModuleRewriter");}

        public static RewriterConfiguration GetConfig(){if (HttpContext.Current.Cache["RewriterConfig"] == null)HttpContext.Current.Cache.Insert("RewriterConfig", ConfigurationManager.GetSection("RewriterConfig"));return (RewriterConfiguration) HttpContext.Current.Cache["RewriterConfig"];}/// <summary>/// Deserializes the markup in Web.config into an instance of the <see cref="RewriterConfiguration"/> class./// </summary>public class RewriterConfigSerializerSectionHandler : IConfigurationSectionHandler {/// <summary>/// Creates an instance of the <see cref="RewriterConfiguration"/> class. : IConfigurationSectionHandler /// </summary>/// <remarks>Uses XML Serialization to deserialize the XML in the Web.config file into an/// <see cref="RewriterConfiguration"/> instance.</remarks>/// <returns>An instance of the <see cref="RewriterConfiguration"/> class.</returns>public object Create(object parent, object configContext, System.Xml.XmlNode section) {// Create an instance of XmlSerializer based on the RewriterConfiguration type...XmlSerializer ser = new XmlSerializer(typeof(RewriterConfiguration));// Return the Deserialized object from the Web.config XMLreturn ser.Deserialize(new XmlNodeReader(section));}}