Causes the faces of the cutting element where it intersects the element it is cutting to be split or unsplit. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2011 
Syntax
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Parameters
- first
-  Type:  Autodesk.Revit.DB Element  
 The solid being cut or the cutting solid
- second
-  Type:  Autodesk.Revit.DB Element  
 The solid being cut or the cutting solid
- split
-  Type:  System Boolean  
 True to split the faces of intersection, false to unsplit them.
Remarks
 There must be a cut between the input elements. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | There is no solid-solid cut between the input elements. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions InvalidOperationException | Unable to split or unsplit faces of cutting solid |