using System;

using System.Linq;

using System.Collections.Generic;

public class D {

    public string Value { get; set; }

    public D(string v) { this.Value = v; }

}

public class Program

{

    public static void Main()

    {

        List<D> DD = new List<D>();

        DD.Add(new D("2018-11-08"));

        DD.Add(new D("2018-12-01"));

        var dd = DD.Where(d=> { 

            Console.WriteLine($"In predicate: {d.Value}"); 

            return d.Value=="2018-12-01"; 

        });

        var dl = dd.ToList();

        foreach (var d in dl) {

            Console.WriteLine($"Final: {d.Value}");

        }

    }

}