static void Main(string[] args)
{
var firm = new Firm();
var manager = new Manager("Pete Savchenko", 18);
var secondmanager = new Manager("Oksana Polishchuk", 14);
var workMan = new Workman("Natasha Sov", 5);
var brigadier = new Brigadier("Tod Popov", 7);
Console.WriteLine($"\nNew employees were added to the base: {firm + manager}", $"{firm + secondmanager}",
$"{firm + workMan}", $"{firm + brigadier}");
var numberOfEmployees = firm.WorkersCounter <IEmployee>();
Console.WriteLine($"\nNumber of employees: {numberOfEmployees}");
var getBrigadier = firm.WorkersCounter <Brigadier>();
Console.WriteLine($"\nNumber of brigadiers: {getBrigadier}");
firm.OutputEmployees();
Console.ReadKey();
}
public static bool ContainsEmployee(this Firm firm, IEmployee employee)
{
return(firm.Employees.Any(employees => employees.Equals(employee)));
}