What is SOLID?

SOLID are five basic principles (in OOP) which help to create good software architecture. In this blog I am just giving quick and short description for it.

SOLID is an acronym where:-

·         S stands for SRP (Single responsibility principle):- A class should have only one responsibility, not multiple. This is for separation of concern.

·         O stands for OCP (Open closed principle):- Extension should be preferred over modification. Meaning rather than “MODIFYING” go for “EXTENSION”.

·         L stands for LSP (Liskov substitution principle):- A parent class object should be able to refer child objects during runtime polymorphism.  LISKOV principle says the parent should easily replace the child object. LISKOV can be implemented through Interface (multiple inheritance). 

·         I stands for ISP (Interface segregation principle):- Client should not be forced to use an interface if it does not need it. Can be achieved be rather than modifying existing interface create new interface which will inherits from existing interface.

·         D stands for DIP (Dependency inversion principle):- High level modules should not depend on low level modules but should depend on abstraction. Both should depend on abstractions. Also Abstractions should not depend on details. Details should depend on abstractions

For detail please refer this article: - http://www.codeproject.com/Articles/703634/SOLID-architecture-principles-using-simple-Csharp