public static Result <TAggregate> HaveVersion <TAggregate>(this Must <TAggregate> must, int expected)
where TAggregate : AggregateRoot <TAggregate>, new()
{
Guard.NotNull(must, nameof(must));
Guard.NotNegative(expected, nameof(expected));
int actual = ((dynamic)must.Subject).Version;
return(must.Be(actual == expected, ConcurrencyIssue.VersionMismatch(expected, actual)));
}
private Result <NameSelection> MustBeKnown(string name, string propertyName)
=> Must.Be(
model: this,
condition: Names.Contains(name),
propertyName: propertyName,
message: Message.CandidateNotFound);