public static RopResult <String10, DomainMessage> CreateFirstName(string firstName)
{
var opt = String10.Create(firstName);
return(Option.Match(
opt,
Rop.Succeed <String10, DomainMessage>,
() => Rop.Fail <String10, DomainMessage>(DomainMessage.FirstNameIsRequired())
));
}
/// <summary>
/// Create a new customer from the parameters. If not valid, return null
/// </summary>
public static PersonalName Create(String10 first, String10 last)
{
if (first == null)
{
return(null);
}
if (last == null)
{
return(null);
}
// Compare this with the F# version, where the domain object
// doesn't need to check for nulls
return(new PersonalName(first, last));
}
// No validation needed because types are already validated
private PersonalName(String10 first, String10 last)
{
First = first;
Last = last;
}