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