public IEnumerable <Messages.Common.Event> ChangeEventTitle(IHoldEventState state, Guid id, string title)
{
if (string.IsNullOrEmpty(title))
{
throw new ArgumentNullException(nameof(title));
}
yield return(new EventTitleUpdated(id, title));
}
public IEnumerable <Event> CreateEvent(IHoldEventState state, Guid id, string title, string description)
{
if (string.IsNullOrEmpty(title))
{
throw new ArgumentNullException(nameof(title));
}
yield return(new EventCreated(id, title, description));
}
