private static bool Part2Validity(Passport passport)
{
if (!Part1Validity(passport))
{
return(false);
}
private static bool Part1Validity(Passport passport)
{
return(new[] { passport.BirthYear, passport.ExpirationYear, passport.EyeColor, passport.HairColor, passport.Height, passport.IssueYear, passport.PassportId }.All(x => !string.IsNullOrWhiteSpace(x)));
}