Public Overridable Sub InvokeAction( _
   ByVal action As Action(Of TPayload), _
   ByVal argument As TPayload _
) 

Dim instance As EventSubscription(Of TPayload)
Dim action As Action(Of TPayload)
Dim argument As TPayload
 
instance.InvokeAction(action, argument)

public virtual void InvokeAction( 
   Action<TPayload> action,
   TPayload argument
)

public procedure InvokeAction( 
    action: Action;
    argument: TPayload
); virtual; 

public function InvokeAction( 
   action : Action,
   argument : TPayload
);

public: virtual void InvokeAction( 
   Action<TPayload*>* action,
   TPayload* argument
) 

public:
virtual void InvokeAction( 
   Action<TPayload^>^ action,
   TPayload^ argument
)