Primitives Activities in WF

.NET Framework 4.6.1 provides several system-provided activities that provide a convenient mechanism for performing common tasks.

Activity Description
Assign Assigns a value to a variable at the current scope.
Delay Puts one path of execution into an idle state, possibly allowing the workflow to be unloaded.
InvokeDelegate Executes a delegate that derives from ActivityDelegate and is exposed as a property.
InvokeMethod Executes a public method of a CLR object.
WriteLine Writes a specified string to the console or a specified TextWriter object.