Missing information: Can Exception.Data be null?

In the old .NET Framework 4 offline help in Visual Studio, the documentation for the property `Exception.Data` contained the following note:

> The `ExecutionEngineException`, `OutOfMemoryException`, `StackOverflowException` and `ThreadAbortException` classes always return **null** for the value of the **Data** property.

This note apparently never made it into the new documentation structure in this repository. I checked the initial checkin for the file `xml/System/Exception.xml` (commit cd8c56990ee) and it doesn't include the note.

So the question is: Was this a deliberate decision (e.g. because the note was not true)? Or was the note simply forgotten and should still be in the documentation?