public override string ToString() {
StringBuilder sb = new StringBuilder("SharedNotebook(");
sb.Append("Id: ");
sb.Append(Id);
sb.Append(",UserId: ");
sb.Append(UserId);
sb.Append(",NotebookGuid: ");
sb.Append(NotebookGuid);
sb.Append(",Email: ");
sb.Append(Email);
sb.Append(",NotebookModifiable: ");
sb.Append(NotebookModifiable);
sb.Append(",RequireLogin: ");
sb.Append(RequireLogin);
sb.Append(",ServiceCreated: ");
sb.Append(ServiceCreated);
sb.Append(",ShareKey: ");
sb.Append(ShareKey);
sb.Append(",Username: ");
sb.Append(Username);
sb.Append(")");
return sb.ToString();
}