RacesVariantFullEqualityComparer.cs

namespace Vereinsmeisterschaften.Core.Models
{
    public class RacesVariantFullEqualityComparer : IEqualityComparer<RacesVariant>
    {
        public bool Equals(RacesVariant x, RacesVariant y)
        {
            if (ReferenceEquals(x, y)) return true;
            if (ReferenceEquals(x, null)) return false;
            if (ReferenceEquals(y, null)) return false;
            if (x.GetType() != y.GetType()) return false;
 
            return x.Score == y.Score && x.Races.SequenceEqual(y.Races);
        }

        public int GetHashCode(RacesVariant obj)
            => obj == null ? 0 : (obj.Races, obj.Score).GetHashCode();
    }
}