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Need of Business Layer?

In .Net Design Pattern in action different Layer is created as  Business Layer.
In Business Layer Business Objects are created and in Data Layer Models are created for Data Storage . Business Objects are geting converted from Data objects. Why to use this style of Coding what are the benefits of making Business Layer seperate from Service Layer? By making Business Objects we are making replica of Data Objects. It is duplication
Laxman Nagtilak, Feb 06, 2015
I'm trying to understand the same thing now. It really seems that the business layer is really only for data validation or a pass-through for domain objects. You can't implement true business rules only data validation.
Mar 12, 2015
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