c# webbrowser komut dizini hatasi

ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
            Console.Title = "Source downloader";
            using (WebClient wc = new WebClient())
            {
                wc.Headers.Add(HttpRequestHeader.UserAgent,
            "other");
               string content= wc.DownloadString($"https://viewdns.info/reverseip/?host={Console.ReadLine()}&t=1");
                File.WriteAllText("source.txt", content);
            }
            Console.ReadLine();