A corporation that is incorporated elsewhere but has registered to do business in a state that requires as a condition of that registration that the corporation appoint an in-state agent for service of process is subject to general personal jurisdiction in that state’s courts on all causes of action.  Such forced consent to general personal jurisdiction does not offend the Due Process Clause.  Rather, the consent operates as a waiver of any objection the corporation might otherwise have to the state’s exercise of personal jurisdiction over it.