count to take how many prints taken from my machine on file print option

You have to create a custom event and a counter, the counter is incremented when   that is triggered, you can create a custom eventArgs with a parameter tha represent the number of copies

 class Program
    {
        static public event PrintCountEventHandler CounterEvent;
        static void Main(string[] args)
        {
            //Implement the logic that triggers the event here
        }
    }

    public delegate void PrintCountEventHandler(object sender, PrintCountEventArgs args);
    public class PrintCountEventArgs : EventArgs
    {
        private int _count;
        public PrintCountEventArgs(int Count)
        {
            Count = _count;
        }

        public int Copies
        {
            get { return _count; }
        }
    }