Hi there,
Dofactory patterns N-Tier architecture is use as described below.
Hosting Layer
Service Layer
Business Layer
Data Layer
Service Layer using WCF -Restful implementation.
Query
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Now ASP.NET Web API may reduce the amount of work/implementation to develop RestFul services. I think that in N-Tier architecture service layer(Where WCF is used) can be replaced with Web API .
Your valuable comments/suggestions are appreciated.
Regards