using System;
using System.Collections;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
//csc CollecT_AsQueryable1.cs
namespace ConsoleApplication1
{

    class Program
    {
        static void Main(string[] args)
        {
            Collection<string> cTList = new Collection<string>();
            cTList.Add("AD"); cTList.Add("B"); cTList.Add("AB");
            cTList.Add("C"); cTList.Add("D"); cTList.Add("AD");
            cTList.Add("E"); cTList.Add("AD");
            Console.WriteLine("Reading List");
            readT(cTList);
            var query1 = cTList.AsQueryable().Select(e => e == "AD");
            //
            Console.WriteLine(" cTList.AsQueryable().Select(e => e ==)" + "AD");
            int n1 = 0;
            foreach (var v1 in query1)
            {
               if (v1) {  Console.WriteLine("@ " + n1 + " " +v1 );}
                else   {  Console.WriteLine("@ " + n1 + " " + v1 );}
                n1++; 
            }
                         Console.ReadLine();
        }
        static void readT(Collection<string> list)
        {
            //notice that the list is passed an IList and hence can handle both types of lists
            //Use IEnumerable
            int n1 = 0;
            foreach (string val in list)
            {
                Console.WriteLine("index " + n1 + " string " + val);
                n1++;
            }

        }
       


    }
}