using System;

using System;

​

public class Account

{

    int accountBalance = 1000;

    public int Balance

    {

        set

        {

            if(value < 0)

            {

                Console.WriteLine("you cannot pass negative value");

            }

            else

            {

                accountBalance  = value; 

            }

        }

        get

        {

            return accountBalance;

        }

    }

}

public class Program

{

    public static void Main()

    {

        Account a = new Account();

        a.Balance = 10000;

        Console.WriteLine("balance is " + a.Balance);

    }

}