Regras Recad grupo, C#

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//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            List<empresa>lst=new List<empresa>(){
                new empresa(){nome="A",associado=true,suspenso=false,dataAssociacao=DateTime.MaxValue},
                new empresa(){nome="AA",associado=true,suspenso=false,dataAssociacao=DateTime.Now},
                new empresa(){nome="B",associado=true,suspenso=true,dataAssociacao=DateTime.Now.AddHours(-1)},
                new empresa(){nome="C",associado=false,suspenso=true,dataAssociacao=DateTime.Now},
                new empresa(){nome="D",associado=false,suspenso=false,dataAssociacao=DateTime.Now}};
            
            foreach(var item in lst
               .OrderBy(e=>e.suspenso)
               .ThenByDescending(e=>e.associado)
               .ThenBy(e=>e.dataAssociacao))
                {Console.WriteLine(item);}
        }
    }
    
    public class empresa 
    {
        public string nome{get;set;}
        public bool associado{get;set;}
        public bool suspenso{get;set;}
        public DateTime? dataAssociacao{get;set;}

public override string ToString()
        {
            return string.Format("{0}-{1}-{2}-{3}",nome, suspenso, associado, dataAssociacao);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0.16 sec, absolute running time: 0.11 sec, cpu time: 0.09 sec, average memory usage: 17 Mb, average nr of threads: 5