public static data::Comment Map(model::Comment comment)
 {
     return new data.Comment
     {
         Text = comment.Text,
         CreatedOn = comment.CreatedOn,
         NoteId = comment.NoteId
     };
 }
 public static data::Note Map(model::Note note)
 {
     return new data.Note
     {
         Id = note.Id,
         Text = note.Text,
         Title = note.Title,
         CreatedOn = note.CreatedOn
     };
 }
 public static data::User Map(model::User user)
 {
     return new data.User
     {
         Id = user.Id,
         CreatedOn = user.CreatedOn,
         FullName = user.FullName,
         IsPremiumUser = user.IsPremiumUser
     };
 }