Microsoft has published MSDN docs that are scoped only for WPF 4.0. Want fast WPF help (from the WPF SDK team members) without an internet connection? Download the WPF CHM . IMPORTANT! If you open the CHM and cannot view content, do the following to resolve the issue: - Right-click the CHM file, and then click "Properties". - Click "Unblock". - Double-click the .chm file to open the file. Janiv.