// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.Method = "POST";
Console.WriteLine ("\nPlease enter the data to be posted to the (http://www.contoso.com/codesnippets/next.asp) Uri :");

// Create a new string object to POST data to the Url.
string inputData = Console.ReadLine ();


string postData = "firstone=" + inputData;
ASCIIEncoding encoding = new ASCIIEncoding ();
byte[] byte1 = encoding.GetBytes (postData);

// Set the content type of the data being posted.
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

// Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length;

Stream newStream = myHttpWebRequest.GetRequestStream ();

newStream.Write (byte1, 0, byte1.Length);
Console.WriteLine ("The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest.ContentLength);

// Close the Stream object.
newStream.Close ();

//引入命名空间
using System;
using System.IO;
using System.Net;

public class HttpPut {

  public static void Main(string [] args) {

    string url = "http://www.java2s.com/";
    string username = "user";
    string password = "password";
    string data = "This data should be written to the URL.";

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    request.Method = "PUT";
    request.Credentials = new NetworkCredential(username, password);
    request.ContentLength = data.Length;
    request.ContentType = "text/plain";

    using (StreamWriter writer = new StreamWriter(request.GetRequestStream( ))) {
      writer.WriteLine(data);
    }

    WebResponse response = request.GetResponse( );

    using (StreamReader reader = new StreamReader(response.GetResponseStream( ))) {
      while (reader.Peek( ) != -1) {
        Console.WriteLine(reader.ReadLine( ));
      }
    }
  }
}