C sharp - Constructor Overloading in C#

What is Constructor Overloading?

Constructor overloading means creating multiple constructors in the same class with different parameter lists. It allows you to create objects in different ways.

Key Points

• Constructors must have the same name (class name).

• Each constructor must have a different number or type of parameters.

• Helps in flexible object initialization.

Syntax

class ClassName
{
    public ClassName() { }

    public ClassName(type param1) { }

    public ClassName(type param1, type param2) { }
}

Simple Example

using System;

class Person
{
    public string name;
    public int age;
    // Default constructor
    public Person()
    {
        name = "Unknown";
        age = 0;
    }
   // Constructor with one parameter
    public Person(string personName)
    {
        name = personName;
        age = 0;
    }
    // Constructor with two parameters
    public Person(string personName, int personAge)
    {
        name = personName;
        age = personAge;
    }
    public void ShowInfo()
    {
        Console.WriteLine("Name: " + name + ", Age: " + age);
    }
}
class Program
{
    static void Main()
    {
        Person p1 = new Person();
        Person p2 = new Person("Alice");
        Person p3 = new Person("Bob", 25);
        p1.ShowInfo();
        p2.ShowInfo();
        p3.ShowInfo();
    }
}

Output:

Name: Unknown, Age: 0  
Name: Alice, Age: 0  
Name: Bob, Age: 25