Basic question on GC

using System;

class Calci
{

    public int Add(int a, int b)
    {

        return (a + b);

    }

    public int Sub(int a, int b)
    {

        return (a - b);

    }

    public int Multi(int a, int b)
    {

        return (a * b);

    }

    public int Divide(int a, int b)
    {

        return (a / b);

    }

}



class GCExample3
{

    public static void Main(string[] args)
    {

        Calci oCalci = new Calci();

        Console.WriteLine("Calci object is now on " + GC.GetGeneration(oCalci) + " Generation");
        Console.WriteLine("call to GC.Collect(0):");
        GC.Collect(0);
        Console.WriteLine("Garbage Collection Occured in 0th Generation:" + GC.CollectionCount(0));
        Console.WriteLine(oCalci.Add(9, 0));
        Console.ReadLine();
    }

}

Calci object is now on 0 Generation
 call to GC.Collect(0):
Garbage Collection Occured in 0th Generation:1
9