public void Transfer(account acc, double amount)
 {
     if (amount <= AccBalance)
     {
         AccBalance     -= amount;
         acc.AccBalance += amount;
         Console.WriteLine("Balance transfered successfully done.");
     }
     else
     {
         Console.WriteLine("Transfer cannot be done insufficient Balance.");
     }
 }
        static void Main(string[] args)
        {
            account a1 = new account("Insana", "39411", 50000);
            account a2 = new account("Marium", "39412", 55000);
            account a3 = new account("Mithila", "39413", 60000);

            a1.Withdraw(10000);
            a2.Withdraw(5000);
            a3.Deposit(15000);
            a1.Transfer(a2, 8000);
            a1.showInfo();
            a2.showInfo();
            transaction t1 = new transaction(a1, a2, 10000, "Study perpose");

            t1.showInfo();
        }