construct soap headr using username and password

See more:

webservice

Following should be the soap-envelope format.

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:urn="urn:nz.govt.ird.eservices.types.account.transaction:0-6">
<soap:Header>
<wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
<wsu:Timestamp>
<wsu:Created>
</wsu:Timestamp>
<wsse:UsernameToken>
<wsse:Username>username
<wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">password
<wsu:Created/>
</wsse:UsernameToken>
</wsse:Security>
</soap:Header>
<soap:Body>
</soap:Body>
</soap:Envelope>

when I add username token using following code

UsernameToken userToken = new UsernameToken("username", "password");
SoapContext context = webserviceProxy.RequestSoapContext;
context.Security.Tokens.Add(userToken);

it adds the wssecurity-secext-1.0.xsd in soapEnvelope

<soap:Envelope xmlns:soap=http://schemas.xmlsoap.org/soap/envelope/ xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xmlns:xsd=http://www.w3.org/2001/XMLSchema xmlns:wsa=http://schemas.xmlsoap.org/ws/2004/08/addressing
xmlns:wsse=http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd
xmlns:wsu=http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd>

I want the soap envelope according to the requirement. please help me to generate the required Soapenvelope with wsse:UsernameToken in SoapHeader.