90. 프로젝션

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

public class Product
{
    public string Name { get; set; }
    public int Quantity { get; set; }
}

public class ProName
{
    public string ModelName { get; set; }
}

public class 프로젝션
{
    public static void Main()
    {
        int[] data = {3, 4, 5, 2, 1};
        var query = from d in data where d % 2 == 0 select d; // 결과유추
        IEnumerable<int> q = from d in data where d % 2 == 0 select d; // 기본
        int[] even = (from d in data where d % 2 == 0 select d).ToArray(); // 배열형로 뽑아냄
        List<int> lst = (from d in data where d % 2 == 0 select d).ToList(); // 리스트로 뽑아냄

        Product[] products = {
                                 new Product{Name="닷넷", Quantity=1000},
                                 new Product{Name="자바", Quantity=10}
                             };
        //var pro = from p in products select p; //[1]
        IEnumerable<ProName> pro = from p in products
                                   select new ProName { ModelName = p.Name }; //[2] 다른 클래스의 프로퍼티로 변환시켜 출력
       
        foreach (var item in pro)
     {
      Console.WriteLine("{0}", item.ModelName); // 다른 개체형으로 변환
     }
    }
}