BuildingCoder.CmdPurgeTextNoteTypes.GetUnusedTextNoteTypesExcluding C# (CSharp) Méthode

        ICollection<ElementId> GetUnusedTextNoteTypesExcluding(
            Document doc)
        {
            ICollection<ElementId> usedTextNotesTypeIds
            = new Collection<ElementId>();

              FilteredElementCollector textNotes
            = new FilteredElementCollector( doc )
              .OfClass( typeof( TextNote ) );

              foreach( TextNote textNote in textNotes )
              {
            usedTextNotesTypeIds.Add(
              textNote.TextNoteType.Id );
              }

              FilteredElementCollector unusedTypeCollector
            = new FilteredElementCollector( doc )
              .OfClass( typeof( TextNoteType ) );

              if( 0 < usedTextNotesTypeIds.Count )
              {
            unusedTypeCollector.Excluding(
              usedTextNotesTypeIds );
              }

              ICollection<ElementId> unusedTypes
            = unusedTypeCollector.ToElementIds();

              return unusedTypes;
        }