Add a new family instance into the Autodesk Revit document, using an origin and a view where the instance should be placed. 
   Namespace:   Autodesk.Revit.Creation  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
Syntax
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| Visual Basic | 
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Parameters
- origin
 -  Type:  Autodesk.Revit.DB XYZ  
The origin of family instance. If created on a ViewPlan , the origin will be projected onto the ViewPlan . 
- symbol
 -  Type:  Autodesk.Revit.DB FamilySymbol  
A family symbol object that represents the type of the instance that is to be inserted. 
- specView
 -  Type:  Autodesk.Revit.DB View  
The 2D view in which to place the family instance. 
Return Value
If creation was successful then an instance to the new object is returned.Remarks
 This overload applies only to 2D family symbols (detail components, annotation symbols, titleblocks, etc.). The type/symbol that is used must be loaded into the document before this method is called. Families and their symbols can be loaded using the Document.LoadFamily or Document.LoadFamilySymbol methods. 
 Exceptions
| Exception | Condition | 
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| Autodesk.Revit.Exceptions ArgumentNullException | One or more required arguments was a null reference ( Nothing in Visual Basic) | 
| Autodesk.Revit.Exceptions ArgumentException | The input family PlacementType was not ViewBased, the input view was not 2D, Thrown if The symbol is not active. or instances of the input FamilySymbol are not permitted on a view of this type. |