I was just going through the support documents and reading the document on the custom heap I noticed that it refers to the 4.1 feature to set the custom heap size. It might be worth adding some of the following attributes to the document.
Applies to Framework versions
Date last reviewed
At the very least the last reviewed will indicate how fresh the document is. When reviewed someone can add a comment that from version xxx a feature is no longer available or has been superseded by someone feature etc.