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Bad small of the code (Duplicated Of The Code (The Solution :check: (From…

- - - - Explame:If Ther The SubClass Has Similar Action Extract Method To The Super Class : MF :Get the steps into methods with the same signature, so that the original methods become the same. Then you can pull them up.
- - - - Extract The Logic Need Set Command To The New Method
    - - Use The Method To Replace The Temp Veriety Or Logic
    - - Replace The Veriety With Class
    - - The Veriety Is Replace By Whole Class And
    - - Extract Method With Class The C N is M N
    - - Refactoring The Condition Logic The Method Or Class
- - - - Extract The Method And Property To The SubClass Use The SunClass Explan The Property
    - - Extract Irrelavent Property The The New Class
    - - Use To Extract Method For Customer And Clear Class And Resove That
    - - Use The Observer Domain Class To Refacry GUI