I\'m implementing a server component that needs to expose a web-service interface, but there is no application need for it to run with ASP.NET on IIS. Is there a straightforward
As long as you're using a verson of .Net that supports it, you should be looking at the Windows Communication Foundation (WCF). You'll need SOME process to host these services, so if you don't use IIS, you may end up writing your own EXE to host the service, but that's where you should start.
http://msdn.microsoft.com/en-us/library/ms731082.aspx
http://msdn.microsoft.com/en-us/netframework/aa663309.aspx
You can use the ServiceHost class to host a service. The WCF tutorial contains sample code.
Hosting and Consuming WCF Services
This is an older article but still relevant.
Yes use ServiceHost.
If you use WCF (Windows Communication Foundation), which has pretty much superceded Web Services, you can host in a Windows Service or in IIS.