How to Set the sandbox instance through .NET?

Hello,

Currently I have a requirement with a VB.NET application to connect

to salesforce, but via the sandbox instance. One way to do it is to

modify the partner.WSDL as follows

<service name="SforceService">
        <documentation>Sforce SOAP API</documentation>
        <port binding="tns:SoapBinding" name="Soap">
            <soap:address location="https://test.salesforce.com/services/Soap/u/10.0" />
        </port>
    </service>

Problem is that the app needs to be compiled each time so a method

via .NET would be preferable.

Thanks in advance.

Rich Spector

Software Engineer /Catapult Data Services.