public static void Main(string[] args)
{
NumberCounter nc = new NumberCounter();
Thread t1 = new Thread(Run4);
Thread t2 = new Thread(Run4);
t1.Start(nc);
t2.Start(nc);
}
public static void Run4(object o)
{
NumberCounter nc = (NumberCounter)o;
for (int i = 0; i < 100; i++)
{
lock (nc)
{
nc.Change();
nc.Show();
}
Thread.Sleep(100);
}
}