Identifies if provided assembly members are valid. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2012 
Syntax
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Parameters
- document
- Type: Autodesk.Revit.DBDocument
 The document.
- assemblyMemberIds
- Type: System.Collections.GenericICollectionElementId
 Element ids to be tested for validity for membership of an assembly instance.
- assemblyId
- Type: Autodesk.Revit.DBElementId
 Id of the existing assembly to add components to. If invalid, the method return whether the components can be added to a new assembly
Return Value
True if all member ids are valid, false otherwise.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | A non-optional argument was null |