Credentials Doesn’t Exist?

Using wpf: Credentials Doesn’t Exist? on newest questions tagged wpf – Stack Overflow

I’m messing about with the Bing Maps WPF control and SOAP services, trying to reverse geocode a point. I tried to implement some code from this project, specifically this block of code:

private string ReverseGeocodePoint(string locationString)
          {
              string results = "";
              ReverseGeocodeRequest reverseGeocodeRequest = new ReverseGeocodeRequest();

              // Set the credentials using a valid Bing Maps key
              reverseGeocodeRequest.Credentials = new GeocodeService.Credentials();
              reverseGeocodeRequest.Credentials.ApplicationId = key;

              // Set the point to use to find a matching address
              GeocodeService.Location point = new GeocodeService.Location();
              string[] digits = locationString.Split(';');

              point.Latitude = double.Parse(digits[0].Trim());
              point.Longitude = double.Parse(digits[1].Trim());

              reverseGeocodeRequest.Location = point;

              // Make the reverse geocode request
              GeocodeServiceClient geocodeService = new GeocodeServiceClient();
              GeocodeResponse geocodeResponse = geocodeService.ReverseGeocode(reverseGeocodeRequest);

              if (geocodeResponse.Results.Length > 0)
                  results = geocodeResponse.Results[0].DisplayName;
              else
                  results = "No Results found";

              return results;
          }

However, when I try to implement it, I’m being told: Error: The type or namespace name 'Credentials' does not exist in the namespace 'GeocodeTest.GeocodeService' (are you missing an assembly reference?) This error occurs on the line:

reverseGeocodeRequest.Credentials = new GeocodeService.Credentials();

Did I forgot a reference somewhere? Am I doing something incorrectly?

source: http://stackoverflow.com/questions/11569025/credentials-doesnt-exist
Using wpf: using-wpf