AssemblyInstance.AddMemberIds
Description:
Adds member element ids for the assembly instance.
Adds member element ids for the assembly instance.
public void AddMemberIds(
ICollection<ElementId> memberIds
)
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ICollection<ElementId>memberIdsElement ids to be added to the assembly instance.
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One or more element ids was not permitted for membership in the assembly instance. Elements should be of a valid category and should not be a member of an existing assembly. -or- The provided set includes one or more element ids that cannot be added to or removed from the assembly on their own.
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A non-optional argument was null