C# Constructor
In C#, constructor is a special method which is invoked automatically at the time of object creation. It is used to initialize the data members of new object generally. The constructor in C# has the same name as class or struct.
There can be two types of constructors in C#.
- Default constructor
- Parameterized constructor
C# Default Constructor
A constructor which has no argument is known as default constructor. It is invoked at the time of creating object.
C# Default Constructor Example: Having Main() within class
using System;
public class Employee
{
public Employee()
{
Console.WriteLine("Default Constructor Invoked");
}
public static void Main(string[] args)
{
Employee e1 = new Employee();
Employee e2 = new Employee();
}
}
Output:
Default Constructor Invoked Default Constructor Invoked
C# Default Constructor Example: Having Main() in another class
Let's see another example of default constructor where we are having Main() method in another class.
using System;
public class Employee
{
public Employee()
{
Console.WriteLine("Default Constructor Invoked");
}
}
class TestEmployee{
public static void Main(string[] args)
{
Employee e1 = new Employee();
Employee e2 = new Employee();
}
}
Output:
Default Constructor Invoked Default Constructor Invoked
C# Parameterized Constructor
A constructor which has parameters is called parameterized constructor. It is used to provide different values to distinct objects.
using System;
public class Employee
{
public int id;
public String name;
public float salary;
public Employee(int i, String n,float s)
{
id = i;
name = n;
salary = s;
}
public void display()
{
Console.WriteLine(id + " " + name+" "+salary);
}
}
class TestEmployee{
public static void Main(string[] args)
{
Employee e1 = new Employee(101, "saurabh", 890000f);
Employee e2 = new Employee(102, "Gaurav", 490000f);
e1.display();
e2.display();
}
}
Output:
101 Sonoo 890000 102 Mahesh 490000
