static void Main(string[] args)
{
Employee e1 = new Employee(2, "Hoang", "Long", 2000);
Console.WriteLine("The Employee has ID of " + e1.getID() + " FirstName of " + e1.getFirstName() + " and LastName of " + e1.getLastName() + " and Salary of " + e1.getSalary());
Employee e2 = new Employee(12, "Hoang", "Long", 3000);
Console.WriteLine("The Employee has ID of {0} , Name : {1} , Salary : {2} , AnnualSalary : {3} and RaiseSalary : {4} ", e2.getID(), e2.getName(), e2.getSalary(), e2.getAnnualSalary(), e2.RaiseSalary(100));
}