基于c# 接口的实例详解

namespace consoleapplication1
{
    using system;
    using system.collections.generic;
    using system.text;
    public class bankmethod : ibankaccount
    {
        decimal balance;
        public void payin(decimal account)
        {
            balance += account;
            //console.writeline("您现在的存款是:{0}",balance);
        }
        public bool payout(decimal account)
        {
            if (balance > account)
            {
                balance -= account;
                console.writeline("您已经取走了{0},还剩下余额是:{1}", account, balance);
                return true;
            }
            console.writeline("提款失败！");
            return false;
        }
        public decimal balance
        {
            get { return balance; }
        }
        public override string tostring()
        {
            return string.format("您现在的存款是:{0:c}", balance);
        }
    }
    class test
    {
        static void main()
        {
            ibankaccount huguo = new bankmethod();
            ibankaccount guo = new bankmethod();
            huguo.payin(10000);
            guo.payin(200000);
            console.writeline(huguo.tostring());
            console.writeline(guo.tostring());
            //bankmethod bank = new bankmethod();
            //bank.payin(200000);
            //bank.payout(30000);
        }
    }
}

namespace consoleapplication1
{
    public interface ibankaccount
    {
        void payin(decimal amount);
        bool payout(decimal amount);
        decimal balance
        {
            get;
        }
    }
    public interface ibanktransfer:ibankaccount
    {
        bool transfer(ibankaccount action,decimal amount);
    }
}