从你的code上来看，-d应该是你要传输的信息，你的代码中-d包含了score=1337的成绩，还有用户名之类的信息。
这里有一段从MSDN摘录的如何使用HttpWebRequest的代码片段。
// 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 ();
所以你对用的HttpWebRequest的方法为：
- Post: HttpWebRequest.Method
- Content-Type: HttpWebRequest.ContentType
- -d: 上面代码片段中inputData的内容
--James
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