BASE64的編碼解碼

//base64編碼
            string strBase = "hello world";
            byte[] bytStr = System.Text.Encoding.Default.GetBytes(strBase);
            string strBase64 = Convert.ToBase64String(bytStr);
            Console.WriteLine("strBase64:{0} length:{1}",strBase64,strBase64.Length);
            //base解嗎
            byte[] byts = Convert.FromBase64String(strBase64);
            string strSource = System.Text.Encoding.Default.GetString(byts);
            Console.WriteLine("source:{0} lenght:{1}",strSource,strSource.Length);