ActivityManager class
SharePoint 2013
This object, member, or enumeration is deprecated and is not intended to be used in your code. SharePoint 2013 includes the following APIs for working with feeds: .NET client, JavaScript, REST, and server. See Work with social feeds to choose the API for your specific feed-related programming tasks.
Contains collections of ActivityApplication and ActivityType objects, and methods to generate feeds by getting existing instances of ActivityEvent objects.
Namespace:
Microsoft.Office.Server.ActivityFeed
Assembly: Microsoft.Office.Server.UserProfiles (in Microsoft.Office.Server.UserProfiles.dll)
This object is constructed from the SPServiceContext object. This is the starting point for building any custom gatherer of activity events.