using System;

public class Program

{

    public static void Main()

    {

        Government government1 = Government.GetInstance();

        Government government2 = Government.GetInstance();

        government1.CollectTaxes();

        government2.CollectTaxes();

        if(government1==government2){

            Console.WriteLine(@"

HA HA WE COLLECTED TAX TWICE, USING SINGLETON DESIGN PATTERN!

YOU'LL NEVER CATCH US NOW!!

            ");

        }

    }

}

public sealed class Government

{

    private long _governmentBudget=0;

    private static  Government _instance;

    private Government(){

    }

    public static Government GetInstance(){

        if(_instance==null){

            _instance=new Government();

        }

        return _instance;

    }

    public void CollectTaxes(){

        Random random=new Random();

        var collectedTax=random.Next(1000000,5000000);

        _governmentBudget+=collectedTax;

        Console.WriteLine(string.Format(@"TAX HAS BEEN COLLECTED BY THE GOVERNMENT

----------------------------------------

Tax collected:          {0}$

Total government budget:    {1}$

​

"

                                        ,collectedTax.ToString("n0")

                                        ,_governmentBudget.ToString("n0")

                                       ));

    }

}