String postData = "requetes=" + textBox2.Text; byte[] postDataBytes = System.Text.Encoding.GetEncoding(1251).GetBytes(postData); System.Net.WebRequest req = System.Net.WebRequest.Create(url); req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; req.ContentLength = postDataBytes.Length; System.IO.Stream reqStream = req.GetRequestStream(); reqStream.Write(postDataBytes, 0, postDataBytes.Length); reqStream.Close(); System.Net.WebResponse res = req.GetResponse(); System.IO.Stream resStream = res.GetResponseStream(); System.IO.StreamReader sr = new System.IO.StreamReader(resStream); textBox4.Text = sr.ReadToEnd(); sr.Close();