I am trying to access content from umbraco by using the umbraco NodeService.asmx but I can't add a web reference to it nor see it with a browser because I receive an error:

Parser Error Message: Could not create type 'umbraco.webservices.NodeService'.

So I checked umbraco.webservices.dll with a .NET Reflector and saw that it didn't contain any
umbraco.webservices.NodeService namespace nor a nodeService class, further more I discovered an enum with all the werbsevices(like DocumentService, FileService) but no NodeService.

So how can I access content from umbraco (if the NodeService cannot be used) ?