Multiple Asynchronous request in c#

Question

I have a situation in which i need to give multiple calls to delegates asynchronously and get the responses. In this code Employee is a class.
I need a callback function which actually gets me both the employees names together.
Ex: class Program
    {
        public delegate string EmployeeCallback(Employee emp);
        private static string UpdateName(Employee emp)
        {            return emp.FirstName;        }
        public static void Main()
        {
            string appstr = string.Empty;
            Employee emp1 = new Employee("Marina", "jimnez", 7000m);
            Employee emp2 = new Employee("wilson", "joe", 7000m);            
            Employee[] emps = new Employee[3];
            emps[0] = emp1;
            emps[1] = emp2;            
            Department dep = new Department(emps, "IT");
            EmployeeCallback updateCallback = new EmployeeCallback(UpdateName);            
            foreach (Employee emp in emps)
            {                result = updateCallback.BeginInvoke(emp, callbackfunction,null);            }
            string finalstring = updateCallback.EndInvoke(result);
            Console.ReadLine();
        }
}

Regards,
Nagu