using System;

using System.Collections.Generic;                   

​

public class Program

{

    public static void Main()

    {

        var foos = new List<Foo>

        {

            new Foo { Name = "Leia" },

            new Foo { Name = "Han Solo" },

            new Foo { Name = "Chewbacca" },

            new Foo { Name = "Luke" },

        };

        var baas = new List<Baa>

        {

            new Baa { Alias = "aaaaa" },

            new Baa { Alias = "bbbb" },

            new Baa { Alias = "Leia" },

            new Baa { Alias = "Luke" }

        };

        // Expected output:

        // results = Foo { "Leia" } and Foo { "Luke" };

    }

    public class Foo

    {

        public string Name { get; set; }

        public int Age { get; set; }

    }

    public class Baa

    {

        public string Alias { get; set; }

        public int SomethingElse { get; set; }

    }

}