public string Post_Web(string url, string Data) {
            Byte[] BinData = (new ASCIIEncoding()).GetBytes(Data);
       
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            HttpWebResponse response;
            request.Method = WebRequestMethods.Http.Post;
            request.Proxy = proxy;
            request.Referer = LastUrl;
            request.AllowAutoRedirect = AutoRedirect;
          request.CookieContainer = CookieContainer;
            request.ContentType = @"application/x-www-form-urlencoded";
            request.Headers.Add(HttpRequestHeader.Cookie, CookiesString); //оправка куки
        // request.MaximumResponseHeadersLength = Int32.MaxValue;
            request.ContentLength = BinData.Length ;
            request.GetRequestStream().Write(BinData, 0, BinData.Length);
            response = (HttpWebResponse)request.GetResponse();
           
            redirect = response.ResponseUri.ToString();
            CookiesString = response.Headers.Get("Set-Cookie"); //чтение куки
            Result = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(response.CharacterSet)).ReadToEnd();
            return Result;
            
        }