books(IEnumerator)

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

namespace ConsoleApplication11
{
    class Book
    {
        string author, title;
        decimal price;
        DateTime data;

        public Book(string _author, string _title, decimal _price, System.DateTime _data)
        {
            author = _author;
            title = _title;
            price = _price;
            data = _data;
        }

        public string Author
        {
            get { return author; }
            set { value = author; }
        }

        public string Title
        {
            get { return title; }
            set { value = title; }
        }

        public decimal Price
        {
            get { return price; }
            set { value = price; }
        }

        public DateTime Data
        {
            get { return data; }
        }
    }

    class MyClass
    {
        Book[] M;
        int count;

        public MyClass(int cap)
        {
            M = new Book[cap];
        }

        public void Add(ConsoleApplication11.Book item)
        {
            M[count] = item;
            count++;
        }

        public int Count
        {
            get { return count; }
            set { value = count; }
        }

        public MyClass Repeat()
        {
            MyClass nc = new MyClass(0);
            for (int i =0; i < M.Length; i++)
            {
                {
                    bool f = true;
                    for (int j = 0; j < nc.M.Length; j++)
                        if (nc.M[j] == M[i])
                        {
                            f = false;
                            break;
                        }
                    if (f)
                        nc.Add(M[i]);
                }
            }
            return nc;
        }
         public System.Collections.IEnumerator GetEnumerator()
        {
            for (int i = 0; i < count; i++)
                yield return M[i];
        }
    }

    class Program
    {
        static void Main(string[] args)
        {

        }
    }
}