BigPipe.Helpers.RendererHelper.RenderViewToString C# (CSharp) Method

        private static string RenderViewToString(ControllerContext context,
            string viewName, object viewData)
        {
            //Create memory writer
            var sb = new StringBuilder();
            var memWriter = new StringWriter(sb);

            //Create fake http context to render the view
            var fakeResponse = new HttpResponse(memWriter);
            var fakeContext = new HttpContext(HttpContext.Current.Request, fakeResponse);
            var fakeControllerContext = new ControllerContext(
                new HttpContextWrapper(fakeContext),
                context.RouteData, context.Controller);

            var oldContext = HttpContext.Current;
            HttpContext.Current = fakeContext;

            //Use HtmlHelper to render partial view to fake context
            var html = new HtmlHelper(new ViewContext(fakeControllerContext,
                new FakeView(), new ViewDataDictionary(), new TempDataDictionary(), memWriter),
                new ViewPage());

            RenderPartialExtensions.RenderPartial(html, viewName, viewData);

            //Restore context
            HttpContext.Current = oldContext;

            //Flush memory and return output
            memWriter.Flush();
            return sb.ToString();
        }