Pro EP 62 : Interface Segregation Principle of SOLID

What is Interface Segregation Principle from SOLID and how to implement it in C# ?

ISP is fourth and second last principle from SOLID principles. At some point ISP and SRP resemble.

ISP says :-
- Class should not be forced to depend on methods it doesn’t use
- Split a lengthy interface to small relevant interfaces

Benefits of ISP:-
- Modularity
- Reusability
- Maintainability
- Low coupled code
- Reduces the chances of defects
- Makes code easy to test and deploy independently

Example
Bad :- Single interface that is responsible card and bank payment processing even if someone would be interested in only one

Good :- Divide single interface to three different interfaces one to process payment and other two for bank and card

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