Gets the subelement referenced by the input reference. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 18.0.0.0 (18.2.0.0) 
  Since:  2018 
Syntax
| C# | 
|---|
   |  
| Visual Basic | 
|---|
   |  
| Visual C++ | 
|---|
   |  
Parameters
- reference
 -  Type:  Autodesk.Revit.DB Reference  
The reference that identifies element or subelement. 
Return Value
The subelement referenced by the input argument.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | reference does not identify a valid element or subelement. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |