Microsoft uses the XML Document format as its standard when defining its Web Services Description Language (WSDL) file.  Well, it turned out that my company implemented an Enterprise Application Interface using Java and their WSDL was in the Java based RPC format. So, to call this Java based web service, I needed to convert this format to Microsoft’s XML based document format. GotDotNet provides a non-supported tool called R2D. This application is an RPC to Document converter and will make your WSDL .NET compliant. This tool was just what I needed. It converted my application and made it compatible with the .NET format. Once converted, Visual Studio will interpret your WSDL and create a proxy for you. Personally, I've found that the WebServiceStudio 2.0 application, also available at GotDotNet, was easier to use than Visual Studio when generating my Proxy class.

WebServiceStudio2.0 is a visual tool which allows you to invoke the methods defined in the WSDL. You can pass in the parameters defined in the WSDL and then invoke the web service. This tool will then return all expected values to the application.

If you are not sure how a specific web service is suppose to behave, then use this application and your doubts will be abated. This is a great tool, and since it also generates a proxy class for you, your work is done.