//In C#, using a web reference to auto generate the proxy class definition,
            var proxy = new GSDIAuthentication.IGSDIBaseAuthentication();
 
            //Not needed, but showing where the web reference goes to get the WSDL
            proxy.Url = "http://gsdi.goldstandard.com/GSDIAuthenticationWS.asmx?WSDL";
 
            //Set up a string array with the key given to you by technical support
            var urls = proxy.Authenticate(new []
                {
                "KEY_ISSUED_BY_GOLDSTANDARD"
                }
            );
 
            foreach (var url in urls)
            {
                //Use the URL field to attach this to an anchor tag server side, this
                //url is what you want users to click on in order to access our site.
                //If an error has occurred, the url.ErrorDescription will be populated
                //with the error message.  Should be blank otherwise.
                Response.Write(url.ErrorDescription);
                Response.Write(url.Url);
            }