using System;

​

namespace bank

{

    class BankAccount

    {

        #region Constructors

        public BankAccount(double balance)

        {

            if (balance < 0) throw new Exception("you can't do that");

            Balance = balance;

        }

        #endregion

​

        #region Methods

        public void TransferTo(double money, BankAccount other)

        {

            if (money < 0) throw new Exception("Money < 0");

            if (money > Balance) throw new Exception("You cannot withdraw this much");

​

            Balance -= money;

            other.Balance += money;

        }

        public void TransferFrom(double money, BankAccount other)

        {

            if (money < 0) throw new Exception("Money < 0");

            if (money > other.Balance) throw new Exception("You cannot withdraw this much");

​

            Balance += money;

            other.Balance -= money;

        }

        #endregion

​

        #region Properties

        public double Balance { get; private set; }

        #endregion

    }

    class Program

    {

        public void Main(string[] args)

        {

            var BankAccount1 = new BankAccount(5000);

​

            var BankAccount2 = new BankAccount(3000);

        }

    }

}