Blade.Utility.RenderingDiagnostics.RenderingStartDiagnostics C# (CSharp) Method

        protected virtual void RenderingStartDiagnostics()
        {
            if (!DiagnosticsEnabled) return;

            //<!-- Begin Rendering "~/bar/Foo.ascx" -->
            //<!-- Rendering was output cached at {datetime}, VaryByData, CachingID = "loremipsum" -->

            var comment = new StringBuilder();

            comment.AppendFormat("<!-- Begin Rendering {0} -->\n", _renderingName);
            if (!_cacheable)
            {
                _writer.Write(comment.ToString());
                return;
            }

            comment.AppendFormat("<!-- Rendering was output cached at {0}", DateTime.Now);
            if (_clearOnIndexUpdate)
                comment.Append(", ClearOnIndexUpdate");
            if (_varyByData)
                comment.Append(", VaryByData");
            if (_varyByDevice)
                comment.Append(", VaryByDevice");
            if (_varyByLogin)
                comment.Append(", VaryByLogin");
            if (_varyByParm)
                comment.Append(", VaryByParm");
            if (_varyByQueryString)
                comment.Append(", VaryByQueryString");
            if (_varyByUser)
                comment.Append(", VaryByUser");
            if (!string.IsNullOrEmpty(_varyByCustom))
                comment.AppendFormat(", VaryByCustom=\"{0}\"", HttpUtility.HtmlEncode(_varyByCustom));

            comment.Append(" -->");

            _writer.Write(comment.ToString());

            _timer.Start();
        }