using System.Collections.Generic;
using System.Linq;

public class Department
{
    private List<Employee> employees;
    private string name;
    decimal averageSalary;


    public Department()
    {
        Employees = new List<Employee>();
    }

    public void AddEmployee(Employee employee)
    {
        this.Employees.Add(employee);
    }

    public decimal AverageSalary => Employees.Select(e => e.Salary).Average();

    public List<Employee> Employees
    {
        get { return this.employees; }
        set { this.employees = value; }
    }

    public string Name
    {
        get { return this.name; }
        set { this.name = value; }
    }
}