Appends one vertex to the end of the wire. 
   Namespace:   Autodesk.Revit.DB.Electrical  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2015 
Syntax
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Parameters
- vertexPoint
 -  Type:  Autodesk.Revit.DB XYZ  
The vertex to be appended. 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The vertex point cannot be added to the wire because there is already a vertex at this position on the view plane (within tolerance). | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions DisabledDisciplineException | None of the following disciplines is enabled: Mechanical Electrical Piping. | 
| Autodesk.Revit.Exceptions InvalidOperationException | The end point is already connected to an element, so a new endpoint vertex cannot be appended. |