Gets the Element referenced by a unique id string. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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| Visual Basic | 
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Parameters
- uniqueId
 -  Type:  System String  
The element unique id, whose referenced Element will be retrieved from the model.- UniqueId
  
Return Value
The element referenced by the input argument.Remarks
    a null reference (  Nothing  in Visual Basic)  will be returned if the input id string doesn't reference to a valid Element. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |