C＃ 如何在窗体中模拟web的Form提交

using System;
using System.Collections;
using System.Net;
using System.Collections.Specialized;

public class MyClass
{
public static void Main()
{
WebClient a = new WebClient();
NameValueCollection na = new NameValueCollection();
na.Add( "Account ", "横刀夺爱 ");
na.Add( "PassPhrase ", "123456 ");
na.Add( "Payee_Account ", "2654824 ");
na.Add( "Amount ", "0.01 ");
na.Add( "PAY_IN ", "1 ");
na.Add( "WORTH_OF ", "Gold ");
na.Add( "Memo ", "just test ");
na.Add( "IGNORE_RATE_CHANGE ", "Y ");
byte [] ss = a.UploadValues( "http://localhost/TestAspx/WebClient_Test.ASPX ", "POST ",na);
Console.ReadLine();
}

}