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

public class Test
{
	public static void Main()
	{
IEnumerable<string> s = new List<string>() { "1", "2", "3" };
var i = s.Select(url =>
    {
        Console.WriteLine(url);
        url = string.Format("--{0}--",url);
        return url;
    }
).ToList();

Console.WriteLine("done with selector");
foreach (string f in i)
{
    Console.WriteLine("f is {0}", f);
}
	}
}