// Create a request using a URL that can receive a post.   
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:56624/Default2.aspx");
            // Set the Method property of the request to POST.  
            request.Method = "POST";
            // Create POST data and convert it to a byte array.  
            string postData = "This is a test that posts this string to a Web server.";
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            // Set the ContentType property of the WebRequest.  
            request.ContentType = "multipart/form-data";
            // Set the ContentLength property of the WebRequest.  
            request.ContentLength = byteArray.Length;
            // Get the request stream.  
            Stream dataStream = request.GetRequestStream();
            // Write the data to the request stream.  
            dataStream.Write(byteArray, 0, byteArray.Length);
            // Close the Stream object.  
            dataStream.Close();
            // Get the response.  
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            // Display the status.  
            Console.WriteLine(((HttpWebResponse)response).StatusDescription);
            // Get the stream containing content returned by the server.  
            dataStream = response.GetResponseStream();
            // Open the stream using a StreamReader for easy access.  
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.  
            string responseFromServer = reader.ReadToEnd();
            // Display the content.  
            Console.WriteLine(responseFromServer);
            // Clean up the streams.  
            reader.Close();
            dataStream.Close();
            response.Close();

通过上面代码把数据post到某一网页，如何获取该Post数据呢

在线等，万分感谢