Dont Repeat Yourself (DRY) Design Principle

This principle states that each small piecesof knowledge (code) may only occur exactly once in the entire system. This helps us to write scalable, maintainable and reusable code. Example – Asp.Net MVC framework works on this principle

source https://www.c-sharpcorner.com/article/dont-repeat-yourselfdry-design-principle/