If you are looking at moving your organization towards Web Services or you already know how to build We Services, but are interested in Microsoft's "Prescriptive Guidance" on how Microsoft suggests that you go about building "Enterprise-class Web Services" then you might want to take a look at the following article from our Patterns and Practices Team.

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From the article:
The Web Service Software Factory (also known as the Service Factory) is an integrated collection of tools, patterns, source code and prescriptive guidance. It is designed to help you quickly and consistently construct Web services that adhere to well known architecture and design patterns.
If you are an architect or developer responsible for building service-based applications, the patterns & practices team would like to invite you to learn how the Service Factory can help your future service development activities. The Service Factory provides guidance that addresses many of the challenges associated with building ASP.NET (ASMX) and Windows Communication Foundation (WCF) Web services and the components of a distributed application. These challenges include:
- Designing ASMX and WCF messages and service interfaces.
- Applying exception shielding and exception handling.
- Designing business entities in the domain model.
- Translating messages to and from business entities.
- Designing, building, and invoking the data access layer.
- Validating the conformance of service implementation, configuration, and security using code analysis.
- Planning for the migration to WCF.
- Applying security to WCF services.
- Applying message validation.
Here's a link to the full article: Click here
~ Robert Shelton