public Employee(int id, string name, string address, department dt)
{
this.id = id;
this.name = name;
this.address = address;
d = dt;
}
static void Main(string[] args)
{
department d = new department(2, "cse");
Employee e = new Employee(2, "swathi", "cheanni", d);
e.show();
d.showdepart();
Console.ReadKey();
}