About System.Net.HttpWebResponse's Encoding

[Osamede Zhang]

I downloaded some web pages use System.Net.HttpWebResponse,and get string
from it

Like this:

webresponse = (System.Net.HttpWebResponse)req.GetResponse();

System.IO.StreamReader stream = new System.IO.StreamReader

(webresponse.GetResponseStream(),Encoding.GetEncod ing("utf-8"));

string content = stream.ReadToEnd();

, but the page I downloaded may not encoded in "utf-8" , so I parse these
page to

get the right encoding, and convert string's encoding ,Like this:

Encoding oldEnc = Encoding.GetEncoding(oldEncoding);

Encoding rightEnc = Encoding.GetEncoding(_encoding);

temp = rightEnc.GetBytes(content);

byte[] asciiBytes = Encoding.Convert(oldEnc,rightEnc,temp);

// Convert the new byte[] into a char[] and then into a string.

// This is a slightly different approach to converting to illustrate

// the use of GetCharCount/GetChars.

char[] asciiChars = new char[rightEnc.GetCharCount(asciiBytes, 0,
asciiBytes.Length)];

rightEnc.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);

string asciiString = new string(asciiChars);

But I just get something can't be understood£¬why? What should I do?

The page I used to test is encoded in "gb2312"

Thanks for your read.