A command decorated with the desired validator

gistfile1.cs

[Validator(typeof (CreateNewNoteValidator))]
[MapsToAggregateRootConstructor("MyNotes.Domain.Note, MyNotes.Domain")]
public class CreateNewNote : CommandBase
{
    public CreateNewNote() {}

    public CreateNewNote(Guid noteId, string text)
    {
        NoteId = noteId;
        Text = text;
    }

    public Guid NoteId { get; set; }

    public String Text { get; set; }
}