try
        {
            string str = "test";
            System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
            byte[] arr = encoding.GetBytes(str);
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("url");
            request.Method = "PUT";
            request.ContentType = "text/plain";
            request.ContentLength = arr.Length;
            request.KeepAlive = true;
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(arr, 0, arr.Length);
            dataStream.Close();
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string returnString = response.StatusCode.ToString();
        }
        catch
        {}

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("url")
request.Method = "POST";
string parameter = "";
parameter += "test=test1&";
parameter += "testing=testing1&";
parameter += "demo=demo1";
byte[] byteArray = Encoding.UTF8.GetBytes(parameter);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

if (HttpStatusCode.OK == response.StatusCode)
{
 dataStream = response.GetResponseStream();
 StreamReader reader = new StreamReader(dataStream);
 responseFromServer = reader.ReadToEnd();
 File.WriteAllText(filepath, responseFromServer);
 response.Close();
}