Close

c# – Method Overloading: Have two or methods of the same name

Method Overloading is basically a technique that lets you have different versions of the same method, where each version of the method does a different thing.

Announcement

I have released my new course on Udemy, Kubernetes By Example. Sign up now to get free lifetime access!

It essentially makes methods more versatile.

Each version of the method accepts different/types of input parameters.

The way you control which of version method you want to trigger, is by specifying the correct number/type of input parameters for that corresponding method.

In the following example, we have 2 methods, which in this case achieves the same goal by different means. The here is to instantiate an object:

[csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Employee
{
public string Firstname { get; set; }
public int Age { get; set; }
public double Salary { get; set; }

// we are going to use a technique called method overloading
// as a way to have 2 methods of the same name,
// and leave it to c# to work out which method we want based
// on the input parameter provided when the method is called.

public Employee(string firstname, int age, double salary)
{

Firstname = firstname;
Age = age;
Salary = salary;
}

public Employee()
{ }

}

class Program
{
static void Main()
{

// Here we initialised the object using the
//default constructor
// to create the empty memory container.
Employee Dave = new Employee()
{
Firstname = "David",
Age = 35,
Salary = 35235.23
};
Console.WriteLine("{0} is {1} years old and earns £{2} per year.", Dave.Firstname, Dave.Age.ToString(), Dave.Salary.ToString());

// Here we used the constructor to create
Employee Jenny = new Employee("Jennifer", 22, 25023.50);

Console.WriteLine("{0} is {1} years old and earns £{2} per year.", Jenny.Firstname, Jenny.Age.ToString(), Jenny.Salary.ToString());
}
}
[/csharp]