public bool Equals(WeightUnit other) =>
 string.Equals(Name, other.Name, StringComparison.Ordinal) &&
 string.Equals(Abbreviation, other.Abbreviation, StringComparison.Ordinal) &&
 ValueInKilograms.Equals(other.ValueInKilograms);
 public bool IsEquivalentOf(WeightUnit other) =>
 ValueInKilograms.Equals(other.ValueInKilograms);