Design patterns are certain model of programming developed to solve specific problem in programming. They suit for certain problem and are well tested and proven method to solve such problem. It is a model that can be applied in specific situation to get optimum result.

We are going to discuss about some base patterns which are :

• Gateway
• Mapper
• Layer Supertype
• Separated Interface
• Registry
• Value Object
• Money
• Special Case
• Plugin
• Service Stub
• Record Set
• Facade