public static void ClearFocus()
If focus is within a Win32 window, WPF calls the ClearFocus method on restoration of focus when a menu is closed.
When leaving menu mode, Win32 focus is returned to the hosted child HWND, and no element has WPF focus.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.