In a rather large .Net application I have a web services layer that I use both as an external API and also in my own web pages. I am thinking about implementing another layer, a client layer that will communicate with the services and to use these client objects in my pages. Since each web services corresponds roughly to a functionality subset in the application, I will have a client class for each one of them. I was wondering what should I implement in these classes besides the simple methods that will call web service methods.