static void Main(string[] args)
{
// interface new lenemez
CustomeManager ccutomerManager = new CustomeManager(); // interface referans tip : onu implemente eden clasın referans nosunu tutabilir
IPersonManager emloyeeManager = new EmployeeManager();
ProjectManager projectManager = new ProjectManager();
projectManager.AddCustomer(customerManager);
}
public void AddCustomer(CustomeManager customeManager)
{
customeManager.Add();
}