c#简单代码：用获得的cookie访问目标网站

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
HttpCookie cookie = Request.Cookies["MyCookieName"];
if (cookie != null)
{
Response.Write("cookie received");
}
else
{
HttpCookie newCookie = new HttpCookie("MyCookieName", "test");
newCookie.Expires = new DateTime(2015, 1, 1);
Response.Cookies.Add(newCookie);
}
}
}

using (WebClient client = new WebClient())
{
string cookieStr = string.Format("MyCookieName=test");
client.Headers["Cookie"] = cookieStr;
string retStr = client.DownloadString("http://www.yoursite.com");
Console.WriteLine(retStr);
}