/// <summary>
/// Static constructor for easy decade creation.
/// </summary>
/// <remarks>
/// The <paramref name="decadeStart"/> must be a multiple of 10. The
/// returned <see cref="YearFrom"/> will be created based on this value,
/// the <see cref="YearTo"/> will be 9 years later.
/// </remarks>
/// <param name="decadeStart">Starting year as integer</param>
/// <returns><see cref="Years"/></returns>
public static Years FromDecade(int decadeStart)
{
if (decadeStart % 10 != 0)
{
throw new ArgumentOutOfRangeException(nameof(decadeStart));
}
return(new Years
{
YearFrom = DateTimeOffsetHelper.FromYear(decadeStart),
YearTo = DateTimeOffsetHelper.FromYear(decadeStart + 9),
});
}