/// <summary>Enables processing of HTTP Web requests by a custom HttpHandler that implements the <see cref="T:System.Web.IHttpHandler" /> interface.</summary>
        ///
        /// <param name="httpReq">      The HTTP request.</param>
        /// <param name="httpRes">      The HTTP resource.</param>
        /// <param name="operationName">Name of the operation.</param>
        public override void ProcessRequest(IHttpRequest httpReq, IHttpResponse httpRes, string operationName)
        {
            httpRes.ContentType = ContentType.Html;
            if (RazorFormat == null)
            {
                RazorFormat = RazorFormat.Instance;
            }

            var contentPage = RazorPage ?? RazorFormat.FindByPathInfo(PathInfo);

            if (contentPage == null)
            {
                httpRes.StatusCode = (int)HttpStatusCode.NotFound;
                httpRes.EndHttpHandlerRequest();
                return;
            }

            var model = Model;

            if (model == null)
            {
                httpReq.Items.TryGetValue("Model", out model);
            }
            if (model == null)
            {
                var modelType = RazorPage != null ? RazorPage.ModelType : null;
                model = modelType == null || modelType == typeof(DynamicRequestObject)
                    ? null
                    : DeserializeHttpRequest(modelType, httpReq, httpReq.ContentType);
            }

            RazorFormat.ProcessRazorPage(httpReq, contentPage, model, httpRes);
        }