C#16进制转换为对应字符的问题，请教了。。。。。。

[ssjywhr]

下面是一段关于验证码的16进制数据，请问要怎么样用C#转换为对应的字符啊？
VC=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

[bdmh]

谁知道你是怎么编码的

[ssjywhr]

就是WEB QQ登陆时发回的验证码。

[cosmo_sei]

根据编码方式而定，而且web qq返回的应该是加密过的密文，你还得解密。

[kingdom_0]

            string str = "AB";
            Console.WriteLine("16进制的字符串AB转换为Int型的值:"+Int32.Parse(str,NumberStyles.HexNumber));
            /*
             * 171
             * */

[ssjywhr]

麻烦大家帮我看看啦