C#读取Cookie

 public class HttpCookie
     {
         [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
         static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved);
         public static string GetCookies(string url)
         {
             uint datasize = ;
             StringBuilder cookieData = new StringBuilder((int)datasize);
             if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x2000, IntPtr.Zero))
             {
                 if (datasize < )
                     return null;

                 cookieData = new StringBuilder((int)datasize);
                 if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, IntPtr.Zero))
                     return null;
             }
             return cookieData.ToString();
         }
     }

使用此方法可以获得Cookie