Creating/Exposing WCF Services From An Existing Application?

Feb 24, 2011

We need to expose some services (i.e. AddressValidatorService, CustomerFinderService) that currently reside in an ASP.NET application to other applications within our organization. Exposing these services via WCF seems like a natural fit, but I don't see any best-practices for how to pull these common services into a WCF wrapper in such a way that my existing ASP.NET application can continue to use them with minimal code changes and/or awareness that the service they are consuming is no longer in-process. I'm especially looking for recommendations on how to structure the existing ASP.NET solution and whether to host our new WCF in the same solution or in some new shared WCF solution referenced by both our ASP.NET application and external callers.Also, is it bad practice to simply promote the DTOs currently only consumed in-process via ASP.NET to full fledged data contracts or is it preferable to create duplicate DTOs that are explicitly decorated with [DataContract]?

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