I am generating the proxy using the wsewsdl2 tool.  It generates as:

[SoapService("http://sib.sanlam.co.za/cra/bds/payroll/2004/10/payroll.wsdl")]
public class PayrollService : SoapClient
{
    public PayrollService() : base( new EndpointReference(new
Uri("PayrollService"), new Uri("http://localhost/services/payroll.ashx")) )
    {
    }

    [SoapMethod("getPayrollList")]
    public getPayrollListResponse getPayrollList( getPayrollList request )
    {
        return (getPayrollListResponse)base.SendRequestResponse("getPayrollList",
request).GetBodyObject( typeof(getPayrollListResponse),
SoapServiceAttribute.TargetNamespace);
    }

    public IAsyncResult BegingetPayrollList( getPayrollList request,
System.AsyncCallback callback, object asyncState)
    {
        return base.BeginSendRequestResponse("getPayrollList", request, callback,
asyncState);
    }

    public getPayrollListResponse EndgetPayrollList( System.IAsyncResult
asyncResult )
    {
        return
(getPayrollListResponse)base.EndSendRequestResponse(asyncResult).GetBodyObject( typeof(getPayrollListResponse), SoapServiceAttribute.TargetNamespace);
    }

}

Because it derives from SoapClient the URL property is not available.
The WSE 2 documentation also states that the Via property is ignored if it
is set after a new instance of the SoapSender class is created.  To set the
Via property, specify it in the soapSender constructor that takes an
EndpointReference.

I can just change the generated code to for instance:

        public PayrollService() : base( new EndpointReference(new
Uri("PayrollService"), new
Uri(System.Configuration.ConfigurationSettings.AppSettings["CRA.Domain.Services.PayrollService"])) ) {
        }

But then when I re-generate the proxy I need to remember to change the code.
I also don't think I can write a class that derives from the proxy class and
hide the generated constructor and show a new constructor as shown above.

I  just want to get some views or best practices on how to deal with this
situation.

Thanks,
Tonie