.NET Framework 4 Built-In Activity Library
This topic applies to Windows Workflow Foundation 4 (WF4).
.NET Framework version 4 includes a new activity library with expanded functionality. The types of activities include the following:
The activites in the built-in activity library can be composed into workflows, or used alongside custom activities. The activities in the built-in activity library are sealed; they are not intended to be used to create new functionality through inheritance.