using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var list = new List<Portfolio>()

        {

            new Portfolio("p1", reservation: true, available: true, emergency: true),

            new Portfolio("p2", reservation: true, available: false, emergency: false),

            new Portfolio("p3", reservation: false, available: true, emergency: false),

            new Portfolio("p4", reservation: false, available: false, emergency: true),

            new Portfolio("p5", reservation: true, available: true, emergency: false),

            new Portfolio("p6", reservation: true, available: false, emergency: true),

            new Portfolio("p7", reservation: false, available: true, emergency: true),

            new Portfolio("p8", reservation: false, available: false, emergency: false)

        };

        foreach(var p in list)

        {

            if(p is null || (!p.Available && !p.Reservation && !p.Emergency))

            {

                Console.WriteLine(p.Name);

            }

        }

    }

​

    public class Portfolio

    {

        public Portfolio(string name, bool reservation, bool available, bool emergency)

        {

            Name = name;

            Reservation = reservation;

            Available = available;

            Emergency = emergency;

        }

​

        public string Name { get; set; }

        public bool Reservation { get; set; }

        public bool Available  { get; set; }

        public bool Emergency  { get; set; }

    }

}