Microsoft Dynamics CRM 2013 Unleashed

Stages

You can set up plug-ins in the pre-stages (either pre-validation or pre-operation) or post-stages (post-operation):

Pre-Stage—Sends control to the plug-in before the real event is executed in the core system. For example, you might attach a plug-in to the Create event of the Account entity; your code would execute before the Account was actually created in the CRM system. With this method, you could prevent the Account or the entity record from being created.

Post-Stage—Executed after the real event has executed in the core system. So, following ...