A Design Pattern is a reusable solution to a commonly occurring problem in software design. It is not complete code but a template or guideline that developers follow to solve a problem in a standard and efficient way.
Design patterns help to:Write clean and maintainable code
Improve code reusability
Reduce complexity
Follow best practices used by experienced developers
Example in C# or ASP.NET development:
Singleton Pattern – Ensures only one instance of a class exists.
Repository Pattern – Separates data access logic from business logic.
Factory Pattern – Creates objects without exposing creation logic.
Example idea:
Instead of writing different logic everywhere, a design pattern gives a structured way to solve the same type of problem.