Duct   |  
 Returns a DuctSizeIterator that iterates through the collection. 
 Namespace: Autodesk.Revit.DB.Mechanical
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Return Value
DuctSizeIteratorA DuctSizeIterator object that can be used to iterate through key-value pairs in the collection.