Identifies if the provided member is valid. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2013 
Syntax
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Parameters
- document
- Type: Autodesk.Revit.DBDocument
 The document.
- elementId
- Type: Autodesk.Revit.DBElementId
 Element ids to be tested for validity for intersecting references.
Return Value
True if the reference is valid, false otherwise.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | A non-optional argument was null |