static void Main(string[] args) { SoftwareCompany company = new SoftwareCompany(); FirstDepartment firstDepartment = new FirstDepartment(company); SecondDepartment secondDepartment = new SecondDepartment(company); ThirdDepartment thirdDepartment = new ThirdDepartment(company); company.setAssignment(7, "Task 1 of the day ", "1/6/2016"); Console.Out.WriteLine("\n"); company.setAssignment(5, "Task 2 of the day", "1/7/2016"); Console.Out.WriteLine("\n"); company.setAssignment(8, "Task 3 of the day", "17/7/2016"); }