I'm trying to run an ATM Simulation in C# with Windows Forms that can have more than one instance of an ATM machine transacting with a bank account simultaneously.

The idea is to use semaphores/locking to block critical code that may lead to race conditions.

My question is this:

How can I run two Forms simultaneously on separate threads? In particular, how does all of this fit in with the Application.Run() that's already there?

Here's my main class:

public class Bank
    {
        private Account[] ac = new Account[3];
        private ATM atm;


        public Bank()
        {
            ac[0] = new Account(300, 1111, 111111);
            ac[1] = new Account(750, 2222, 222222);
            ac[2] = new Account(3000, 3333, 333333);


            Application.Run(new ATM(ac));


        }

        static void Main(string[] args)
        {
            new Bank();
        }
    }

...that I want to run two of these forms on separate threads...

 public partial class ATM : Form
{
    //local reference to the array of accounts
    private Account[] ac;

    //this is a reference to the account that is being used
    private Account activeAccount = null;

    private static int stepCount = 0;

    private string buffer = "";

    // the ATM constructor takes an array of account objects as a reference
    public ATM(Account[] ac)
    {
        InitializeComponent();  //Sets up Form ATM GUI in ATM.Designer.cs
        this.ac = ac;
    }
...

I've tried using

Thread ATM2 = new Thread(new ThreadStart(/*What goes in here?*/));

But what method do I put in the ThreadStart constructor, since the ATM form is event-driven and there's no one method controlling it?

Thanks, Calum