using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

​

public class Program

{

    public static void Main()

    {

    var foos = new List<Foo>();

        var filter = foos.Select(Foo.Project);

        Console.WriteLine("Hello World");

    }

}

​

public class Foo

{

    public Bar Bar {get;set;}

​

    public string A { get;set;}

​

    public string B { get;set;}

​

    public string Start { get;set;}

​

    public string Select { get;set;}

    public static Expression<Func<Foo, Foo>> Project => x => new Foo {

            Bar = new Bar {

                Baz = x.Bar.Baz

            },

            Start = x.Start

        };

}

​

public class Bar {

    public string Baz { get;set;}

    public string Left { get;set;}

    public string Right { get;set;}

    public string Up { get;set;}    

}