I am following the steps described in the following link to add a context menu (associated with a textbox) from xaml to my WPF application:

http://help.infragistics.com/Help/NetAdvantage/WPF/2012.1/CLR4.0/html/xamContextMenu_Getting_Started_with_xamContextMenu.html

I followed steps 1, 2, 3 and 4 correctly. When I follow step 5 I get an error saying "The attachable property Manager was not found in type ContextMenuService". I declared the things described in step 5 right after closing the Textbox tag (</Textbox>). I have all the requried assembly references. I am not suer what I am doing wrong. Any help would be appreciated.