public override string ToString() {
StringBuilder sb = new StringBuilder("NoteCollectionCounts(");
sb.Append("NotebookCounts: ");
sb.Append(NotebookCounts);
sb.Append(",TagCounts: ");
sb.Append(TagCounts);
sb.Append(",TrashCount: ");
sb.Append(TrashCount);
sb.Append(")");
return sb.ToString();
}