base64 and UTF-8 encoding issue

Hello everyone,

I am writing a simple web method which returns byte[], and the byte[] is encoded by UTF-8. I have investigated related WSDL and soap message, seems the underlying web services stack will use base64 encoding?

For various reasons, I can not use or re-encode my return byte[] from UTF-8 to base64. Any ideas to modify the base64 encoding to UTF-8 encoding?

Here is my related web methods, SOAP message and related type in WSDL

[Code]
Web service server side code

        [WebMethod]
        public byte[] HelloWorld2()
        {
            return utf8encodedbytes;
        }

SOAP response

http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
 
    http://tempuri.org/">
      base64Binary
   
 

related type in WSDL

xsd:base64Binary
[/Code]

thanks in advance,
George