using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var a = new List<Foo>{

            new Foo(),      

            new Foo { Bar = Bar.Yes }

        };

        Console.WriteLine($"bar: {a.FirstOrDefault().Bar}");

        Console.WriteLine($"bar: {a.LastOrDefault().Bar}");

        Console.WriteLine($"bar: {a.Select(x => x.Bar).FirstOrDefault()}");

        Console.WriteLine(a.LastOrDefault()?.Bar == Bar.Yes);

        Console.WriteLine(a.FirstOrDefault()?.Bar == Bar.Yes);

        Console.WriteLine(a.FirstOrDefault(x => x.Baz)?.Bar == Bar.Yes);

    }

}

​

public class Foo

{

    public bool Baz {get;set;}

    public Bar? Bar

    {

        get;

        set;

    }

}

​

public enum Bar

{

    Yes,

    No

}