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C# Destructor

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A destructor is the opposite of a constructor. A destructor destroys the object of a class as soon as the scope of an object ends. It is also invoked automatically just like a constructor.

The destructor cannot have parameters nor modifiers.

Syntax of destructor in C#

The destructor has the exact same name as the class, the difference is, it is prefixed with a tilde sign (~).

//Syntax
~ClassName()

//Example
using System;
namespace program
{
    class Square
    {
        ~Square() // destructor
        {
           // statement
        }
    }
}

let us see an example of a destructor in C#.

Example of constructor and destructor in C#

using System;

namespace program
{
  public class Student
  {
    public int roll;
    public String name;
    public float score;

    //constructor
    public Student(int r, String n, float s)
    {
      roll = r;
      name = n;
      score = s;
    }

    public void display()
    {
      Console.WriteLine(roll + " " + name + " " + score);
    }

    //Destructor
    ~Student()
    {
       Console.WriteLine("Destructor invoked");
    }
  }

  class StudenInfo
  {
    public static void Main(string[] args)
    {
      Student std1 = new Student(1101, "Shaun", 80.5 f);
      Student std2 = new Student(1102, "Garen", 90 f);

      std1.display();
      std2.display();

    }
  }
}

Output:

1101 Shaun 80.5
1102 Garen 90
Destructor invoked
Destructor invoked

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