Entity Framework Core HasOne and WithMany doesn’t exist

I have that but it still show me a warning

public class CarEquipment
{

    public int CarId { get; set; }
    public int EquipmentId { get; set; }

    public Car Car { get; set; }
    public Equipment Equipment { get; set; }
}

public class Equipment
{
    public int EquipmentId { get; set; }
    public IEnumerable<string> Item { get; set; }
    public List<CarEquipment> CarEquipments { get; set; }
}
public class
{
    public int CarId { get; set; }
    public string Brand { get; set; }
    public string Model { get; set; }
    public int Price { get; set; }

    public List<CarEquipment> CarEquipments { get; set; }
}

public DbSet<Car> Cars { get; set; }
    public DbSet<Equipment> Equipments { get; set; }
    public DbSet<CarEquipment> CarEquipments { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Car>().HasKey(x => x.CarId);
        modelBuilder.Entity<CarEquipment>().HasKey(x => new { x.CarId, x.EquipmentId });
        modelBuilder.Entity<Equipment>().HasKey(x => x.EquipmentId);
        modelBuilder.Entity<CarEquipment>().HasOne(x => x.Equipment).WithMany(x => x.CarEquipments);
        modelBuilder.Entity<CarEquipment>().HasOne(x => x.Car).WithMany(x => x.CarEquipments);
    }