How to: Determine the Installed Version of WPF
The version number for the current installed version of Windows Presentation Foundation (WPF) is located in the Registry.
To find the version number:
On the Start menu, click Run.
In Open, type regedit.exe.
Open the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0\Setup\Windows Presentation Foundation
The WPF version number is stored in the Version value.