C#_OOP_Enum_NestedClass_Generics_Program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace App2b
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("My constant is {0}", Human.PI);
            Console.WriteLine("My onlyRead has value = {0}", Human.onlyRead);
            // int counter = 0;
            Human person1 = new Human("Stoyan", 50, Human.BrainSize.Normal);
            // Console.WriteLine(person1.onlyRead);
            // counter++;
            Human person2 = new Human(20, "Ivan", "Petko", "Nikol");
            // counter++;
            Human person3 = new Human();
            // counter++;

            // person1.onlyRead = 3.4;

            // Console.WriteLine("My name is {0}. I am {1} years old!", person1.Name, person1.Age);
            // Console.WriteLine("My name is {0}. I am {1} years old!", person2.Name, person2.Age);

            Human.Nationality = "German";

            person1.IntroduceYourSelf("verbous");
            person2.IntroduceYourSelf();
            Console.WriteLine(person2.GetFriendName(0));
            person3.IntroduceYourSelf();

            IncreasePopulation();

            Student student1 = new Student("Kircho", 25, 2345);
            Athlete athlete1 = new Athlete("Krisi", 26, "futbol");

            student1.IntroduceYourSelf();
            athlete1.IntroduceYourSelf();

            // Console.WriteLine((int)Human.BrainSize.small);
            Executor exec1 = new Executor(athlete1);
            exec1.MakeHimSpeak();

            Console.WriteLine(Days.Friday);
            Console.WriteLine((int)Days.Friday);
            Console.WriteLine(Days.Friday is Days);

            Manager<Student> manager = new Manager<Student>();
            // manager.AddStudent(student1);
            // manager.AddStudent(student1);
            // manager.RemoveStudent();
            manager.AddEntity(student1);
            manager.AddEntity(student1);
            manager.RemoveEntity();
            Console.WriteLine("I am managing {0} entities!", manager.GetNumberOfEntities());

            Console.WriteLine("The population {0}", Human.counter);

            Console.WriteLine("National Income is {0}", Human.CalculateNationlIncome());

            Console.WriteLine("Hello World!");
            Console.Read();
        }

        public static void IncreasePopulation()
        {
            Human person1 = new Human("Petko", 15, Human.BrainSize.Large);
        }

        public enum Days {
            Monday, Tuesday, Wednesday, Thursday, Friday = 400, Saturday, Sunday
        }
    }
}