using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Instance a= new Instance();

        Instance a1= new Instance();

        Instance a2= new Instance();

        Instance a3= new Instance();

        Instance a4= new Instance();

        Instance b5= new Instance();

        Instance a6= new Instance();

        Instance a7= new Instance();

        Instance b8= new Instance();

        Instance a9= new Instance();

        Instance a10= new Instance();

        //Instance b11= new Instance();

    }

}

​

public class Instance

{

    static int x=0;

    static Instance()

    {

        x=1;

        Console.WriteLine(x);

    }

    public  Instance()

    {

   if(x>10)

    {

    Console.WriteLine("not allowed");

    throw new Exception("not allowed");

    }

   else

    {

     Console.WriteLine(x);

     ++x;

     }

    }

​

}