What is the Difference Between Overriding and Overloading in C#?

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The main difference between overriding and overloading in C# lies in the purpose and behavior of these two concepts:

  1. Overloading:
  • Overloading is a type of polymorphism, also known as "compile-time polymorphism" or "static polymorphism".
  • It allows you to create multiple methods with the same name but different signatures (parameters) within the same class.
  • The method call is determined at compile time, which means the compiler checks which method should be called based on the parameters passed.
  • Changing the method's return type does not overload the method.
  1. Overriding:
  • Overriding is a type of polymorphism, also known as "run-time polymorphism" or "dynamic polymorphism".
  • It involves having two methods with the same name and the same signature (parameters), one in the base class and the other in the derived class.
  • The method call is determined at runtime, which means the actual method to be called is decided at run time.
  • Overriding allows a derived class to provide its own implementation of a method that it inherits from a base class.

In summary, overloading is a static form of polymorphism where multiple methods with the same name but different signatures are created within the same class, while overriding is a dynamic form of polymorphism where a method with the same name and signature is present in both the base and derived classes, with the derived class providing its own implementation.

Comparative Table: Overriding vs Overloading in C#

The main difference between overriding and overloading in C# lies in their dynamic or static nature, as well as their purpose. Here's a table summarizing the differences:

Feature Overriding Overloading
Purpose Provides a different implementation of the same method in inherited classes. Allows multiple methods with the same name but different parameters within the same class.
Dynamic or Static Dynamic (determined at runtime). Static (determined at compile time).
Binding Late binding (occurs at runtime). Early binding (occurs at compile time).
Method Signature Same method name and different implementations. Same method name but different parameters (number, order, or data types).
Keyword virtual and override. -

In summary, overriding is a dynamic process that allows a subclass to provide its own implementation of a method it inherits from a superclass, while overloading is a static process that enables multiple methods with the same name but different parameters within the same class.