OOP:
	4 T/c trong lập trình hướng đối tượng
	Interface
	Overloading
Delegate & Event
Exception

#Program.cs

using System;

namespace Lesson11
{
    delegate void ShowInfo();

    class Program
    {
        static void Main(string[] args)
        {
            //Test01();
            //Test02();
            Test03();
        }

        static event ShowInfo showEvent;

        static void Test03()
        {
            //Test delegate
            ShowInfo show = TestEvent;
            show();

            //Amator
            showEvent = TestEvent;
            showEvent();
        }

        static void TestEvent()
        {
            Console.WriteLine("ok 1.....");
            Console.WriteLine("ok 1.....");
            Console.WriteLine("ok 1.....");
            Console.WriteLine("ok 1.....");
            Console.WriteLine("ok 1.....");
            Console.WriteLine("ok 1.....");
            Console.WriteLine("ok 1.....");
        }

        //Test -> Exception
        static void Test02()
        {
            //Tao doi tuong sinh vien yeu cau nhu sau:
            //Email -> chua ky tu @ -> khong co -> NotEmailException
            //Gender -> Nam, Nu -> ko phai -> NotGenderException
            //Test -> NotEmailException -> Sai dia chi email
            //Test -> NotGenderException -> sai gioi tinh
            //Test -> Nhap du lieu chinh xac.

            Student student = new Student();
            try
            {
                student.Fullname = "ABC";
                student.Email = "tranvandiep.it@gmail.com";
                student.Gender = "NAam";
                student.Display();
            } catch(NotGenderException e)
            {
                Console.WriteLine("Sai gioi tinh : " + e.Message);
            } catch(NotEmailException e)
            {
                Console.WriteLine("Sai dia chi email");
            }
        }

        //Test -> partial
        static void Test01()
        {
            Student student = new Student();
            student.Fullname = "ABC";
            student.Birthday = "1990";
            student.Display();
            student.Input();
        }
    }
}

#Student.cs

using System;
namespace Lesson11
{
    public partial class Student
    {
        public string Fullname { get; set; }

        private string _email;
        public string Email {
            get
            {
                return _email;
            }

            set
            {
                if(!value.Contains("@"))
                {
                    //Throw exception
                    throw new NotEmailException();
                }
                _email = value;
            }
        }

        public Student()
        {
        }

        public Student(string fullname, string email, string phone, string gender, string birthday)
        {
            Fullname = fullname;
            Email = email;
            Phone = phone;
            Gender = gender;
            Birthday = birthday;
        }

        public void Input()
        {
            Console.WriteLine("Nhap du lieu...");
        }

        private void ShowTest()
        {
            Console.WriteLine("okok....");
        }
    }
}

#Student01.cs

using System;
namespace Lesson11
{
    public partial class Student
    {
        public string Phone { get; set; }

        private string _gender;
        public string Gender
        {
            get
            {
                return _gender;
            }

            set
            {
                if(value != "Nam" && value != "Nu")
                {
                    //Throw exception
                    throw new NotGenderException("Nhap sai gioi tinh ...");
                }
                _gender = value;
            }
        }
        public string Birthday { get; set; }

        public virtual void Display()
        {
            Console.WriteLine("Ten: {0}, email: {1}, gioi tinh: {2}", Fullname, Email, Gender);
        }
    }
}

#Student02.cs

using System;
namespace Lesson11
{
    public class Student02 : Student
    {
        public Student02()
        {
        }

        public override void Display()
        {
            base.Display();
        }

        public override string ToString()
        {
            return base.ToString();
        }
    }
}

#NotEmailException.cs

using System;
namespace Lesson11
{
    public class NotEmailException : Exception
    {
        public NotEmailException()
        {
        }
    }
}

#NotGenderException.cs

using System;
namespace Lesson11
{
    public class NotGenderException : Exception
    {
        public NotGenderException()
        {
        }

        public NotGenderException(string msg):base(msg)
        {
        }
    }
}