---
title: "Method Overloading and Method overriding"  
description: "In this article we will learn about one of the most reusable object oriented features of C#,Method Overloading and Method  overriding ."  
author: "Niraj Kumar Mishra"  
published: 2017-08-23  
updated: 2019-01-30  
canonical: https://www.mindstick.com/articles/12547/method-overloading-and-method-overriding  
category: "c#"  
tags: ["c#", "oops"]  
reading_time: 3 minutes  

---

# Method Overloading and Method overriding

##### Method Overloading :

[Method overloading](https://www.mindstick.com/articles/12033/method-overloading-in-c-sharp) is a feature of object [oriented programming](https://www.mindstick.com/forum/162/object-oriented-programming-oop-s) where you can make or create multiple method with same name but parameters and types are different in a single class.

##### You can be achieve method overloading by following things:

##### 1. By changing the number of parameters used.

##### 2. By changing the order of parameters.

##### 3. By using different data types for the parameters.

##### Example:

```
  class MethodOverloading  {      public int sum(int m, int n)  //two int type Parameters method        {          return m + n;      }      public int sum(int m, int n, int o)  //three int type Parameters with same method same as above        {          return m + n + o;      }      public float sum(float m, float n, float o, float p) //four float type Parameters with same method same  as above      {          return m + n + o + p; ;      }  }
```

\

As you can see that in the above example we have created three methods with

same name sum() but all of them having different parameters and types.

##### Important Question for method overloading

Question: Can method overloading has same numbers of parameters and name

\

with different return types?

\

Answer: No, because conflict is arise in methods [while passing](https://yourviews.mindstick.com/view/158/do-you-get-intrigued-while-passing-through-a-madarssa) the parameters.

##### Method Overriding :

[Method Overriding](https://www.mindstick.com/articles/12227/method-overloadind-and-method-overriding-in-c-sharp) means if you are creating a method in a child or [derived class](https://answers.mindstick.com/qa/30686/what-is-a-base-class-and-derived-class) with same name and parameters and also defining same return types as in the base class then it is called as method overriding .

##### Some key points of method overriding

##### - Method overriding is only possible in child class or derived class not within the

##### same class where the method is declared.

##### - You can only overrides those methods in derived class that are already declared in

##### base class with virtual keyword or abstract keyword.

##### \
Example:

```
    public class Account1    {        public virtual int balance()        {            return 10;        }    }     public class Account2 : Account1    {        public override int balance()        {            return 500;        }    }
```

So, we can say that, the method overriding is very useful when we want to return different output of same method in different child classes according to the need.

**Note:** in the above example balance() method of Account2 class having a keyword ‘override’, because if we override any method of base class without using ‘override’ keyword then it will show a warning message like this – (To make the current member override that [implementation](https://answers.mindstick.com/qa/44913/who-is-the-minister-of-statistics-and-programme-implementation), add the override keyword. Otherwise add the new keyword.)

---

Original Source: https://www.mindstick.com/articles/12547/method-overloading-and-method-overriding

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