public async void CheckUrl(string url) { ProccessIsStart = false; MyStopwatch.Restart(); WebRequest webRequest = WebRequest.Create(url); WebResponse response = await webRequest.GetResponseAsync(); using (StreamReader reader = new StreamReader(response.GetResponseStream())) { string sizeOfCharters = await reader.ReadToEndAsync(); UrlSize = $"Size of Your Size Is: {sizeOfCharters.Length.ToString()} Bytes."; } ProccessIsStart = true; MyStopwatch.Stop(); }