Content Types Event Receivers

http://pietersveenstra.wordpress.com/2011/12/12/removing-multiple-event-handlers-from-content-type-or-list/

http://charliedigital.com/2010/10/06/programmatically-adding-an-event-receiver-to-a-content-type/


http://social.technet.microsoft.com/Forums/en-US/sharepoint2010programming/thread/ffc35fd4-2b26-4e56-a924-a3b9d9e25e6b