public static void Main() { Employee o1 = new Employee("Amol", 12346555, 1015); Employee o2 = new Employee("Amol", 123465); Employee o3 = new Employee("Amol"); Employee o4 = new Employee(); Console.WriteLine(o1.toString()); Console.WriteLine(o2.toString()); Console.WriteLine(o3.toString()); Console.WriteLine(o4.toString()); Console.WriteLine(o1.EmpNo); Console.WriteLine(o2.EmpNo); Console.WriteLine(o3.EmpNo); Console.WriteLine(o3.EmpNo); Console.WriteLine(o2.EmpNo); Console.WriteLine(o1.EmpNo); }