using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        List<Customer> Customers = new List<Customer>() 

        { 

            new Customer { First = "Joe", Last = "Smith", Age = 30 }, 

                new Customer { First = "Jane", Last = "Kendall", Age = 20 } ,

                new Customer { First = "Jill", Last = "Happy", Age = 10 } ,

                new Customer { First = "Mary", Last = "Pants", Age = 40 } ,

                new Customer { First = "Sally", Last = "Jacket", Age = 50 } 

        };

        // Project the Customer into a new type using select - the new type does not contain 'Age'

        var projection = Customers.Select(c => new { c.First, c.Last });//.Where(c => c.Last.Contains("a"));

        foreach (var item in projection)

            Console.WriteLine("{0} {1}", item.First, item.Last);

    }

}

​

public class Customer

{

    public string First { get; set; }

    public string Last { get; set; }

    public int Age { get; set; }

}