关于cefsharp 获取js动态加载后的信息

IFrame frame = null;
            var identifiers = Browser.GetBrowser().GetFrameIdentifiers();
            foreach (var i in identifiers)
            {
                frame = Browser.GetBrowser().GetFrame(i);

                if (frame != null)
                {
                    var task = frame.GetSourceAsync();
                    task.Wait();
                    string content = task.Result;
                }
            }