using System;

using System.Collections.Generic;

using System.Linq;  

​

public class Foo

{

    public string Fname{get; set; }

    public string Lname{get; set; }

    public int Id{get; set; }

}

​

public class Bar

{

    public string LastFirstName {get; set; }

    public int Id {get; set; }

}

​

public class FooToBar

{

    public IEnumerable<Bar> GetFirstAndLastNames(IEnumerable<Foo> foos)

    {

    }

}