✅ How to modernize this code ?

using System.Collections;
using System.Runtime.CompilerServices;
using Chocco.Services.Availability.Core.Exceptions;
using Chocco.Services.Availability.Core.ValueObjects;

namespace Chocco.Services.Availability.Core.Entities;

public class Resource : AggregateRoot
{
    private ISet<string> _tags = new HashSet<string>();
    private ISet<Reservation> _reservations = new HashSet<Reservation>();

    public IEnumerable<string> Tags
    {
        get => _tags;
        private set => _tags = new HashSet<string>(value);
    }
    
    public IEnumerable<Reservation> Reservations
    {
        get => _reservations;
        private set => _reservations = new HashSet<Reservation>(value);
    }
    
    public Resource(AggregateId id, IEnumerable<string> tags, IEnumerable<Reservation>? reservations = null, int version = 0)
    {
        var enumerable = tags.ToList();
        
        ValidateTags(enumerable);
        Id = id;
        Tags = enumerable;
        Reservations = reservations ?? Enumerable.Empty<Reservation>();
        Version = version;
    }
    
    private static void ValidateTags(IEnumerable<string> tags)
    {
        var enumerable = tags.ToList();
        if (tags is null || !enumerable.Any())
        {
            throw new MissingResourceTagsException();
        }
        
        if (enumerable.Any(string.IsNullOrWhiteSpace))
        {
            throw new InvalidResourceTagsException();
        }
    }
}