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

namespace ConsoleApplication1
{
    class Persons
    {
        private string name = null;
        private int age = 0;
        private string email = null;

        public string Name
        {

            get { return this.name; }
            set
            {
                if (String.IsNullOrEmpty(value))
                {
                    throw new Exception("Name cannot be empty!");
                }

                this.name = value;
            }
        }
        public int Age
        {

            get { return this.age; }
            set
            {
                if (this.age < 1 || this.age > 100)
                {

                    throw new ArgumentOutOfRangeException ("Age shoud be in range 1...100!");
                }

                this.age = value;
            }
        }
        public string Email
        {

            get { return this.email; }
            set
            {
                if (ValidateEmail(this.email) == false)
                {

                    throw new Exception("Invalid email. Email should contain \"@\"");
                }

                this.email = value;
            }
        }

        private bool ValidateEmail(string email)

        {
            bool isValidEmail = false;

            for (int i = 0; i < email.Length; i++)
            {
                if (email[i] == '@')
                {
                    isValidEmail = true;
                    break;
                }
            }
            return isValidEmail;

        }

        public Persons (string name, int age)
        {
            this.Name = name;
            this.Age = age;
        }
        public Persons(string name, int age, string email)
        {
            this.Name = name;
            this.Age = age;
            this.Email = email;
        }

    public override string ToString()
        {
            return "First person's name is " + this.name + "he/she is " + this.age + "years old and his/her email is " + this.email;

        }



        static void Main(string[] args)
        {
            Persons Ani = new Persons("Ani", 35);
            Persons Lili = new Persons("Lili", 3, "Lili@baby.tv");
          //  Persons Rumi = new Persons ("Rumi", 102);
         //   Persons Mitko = new Persons ("", 40, "noemail");

            Console.WriteLine(Ani);
            Console.WriteLine(Lili);
       //     Console.WriteLine(Rumi);
       //     Console.WriteLine(Mitko);

        }
    }
}