Bankteller console application

问题

I'm making a simple application to simulate the bankteller problem. What I'm trying to simulate is:

You have 4 counters in a store. 1 counter is open. Customers start coming in and enter the line for the first counter.

When the fourth customer enters the line for the first counter, another counter should open. The line should be equally divided between the 2 counters.When the customer at the second counter is helped and no new customers enter the line, the counter should close. Basically 4 is too many.

I can't seem to figure it out. I know I need to use a queue. But how? Could someone give me an example in console application? Preferable C#.

Thanks in advance.

Here is what I tried so far,

register class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RegisterCounter
{
    class Register
    {
    private int customerCount;
    public Queue<Customer> Line = new Queue<Customer>();

    public Register()
    {
        customerCount = 2;
    }

    public Register(int customerCount)
    {
        this.customerCount = customerCount;
    }

    public int getCustomers()
    {
        return customerCount;
    }
}

}

Customer class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RegisterCounter
{
    class Customer
    {
    private int checkoutTime;

    public Customer()
    {
        checkoutTime = 3;
    }

    public Customer(int checkoutTime)
    {
        this.checkoutTime = checkoutTime;
    }

    public int GetCheckoutTime()
    {
        return checkoutTime;
    }
}

}

Register manager:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace RegisterCounter
{
    class RegisterManager
    {
        public List<Register> registers = new List<Register>();
        Register r1 = new Register();
        Customer c1 = new Customer();


        public RegisterManager()
        {
            registers.Add(r1);
        }

        public void ManageCustomers()
    {
        for (int i = 0; i < registers.Count; i++)
        {
            registers.Insert(i, new Register());

            if (i / 4 <= registers..Line.Count)
            { 

            }
        }
    }
}

}

来源：https://stackoverflow.com/questions/23674705/bankteller-console-application