Creates a new Zone element. 
   Namespace:   Autodesk.Revit.Creation  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
Syntax
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Parameters
- level
 -  Type:  Autodesk.Revit.DB Level  
The level on which the Zone is to exist. 
- phase
 -  Type:  Autodesk.Revit.DB Phase  
The associative phase on which the Zone is to exist. 
Return Value
If successful a new Zone element within the project, otherwise a null reference ( Nothing in Visual Basic) .Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | Thrown when the specified parameter Value is a null reference ( Nothing in Visual Basic) . | 
| Autodesk.Revit.Exceptions InvalidOperationException | Thrown when the electrical system cannot be created by these input phase and level. | 
| Autodesk.Revit.Exceptions ArgumentException | Thrown if the level does not exist in the given document. | 
| Autodesk.Revit.Exceptions ArgumentException | Thrown if the phase does not exist in the given document. |