"2. The parties must be joined in accordance with the rules relating to joinder of parties and specifically Rule 2232(c) of the Pennsylvania Rules of Civil Procedure and they may not be joined in any other manner.
Pennsylvania Rule of Civil Procedure 1033 entitled "Amendment" makes no provision for amending a complaint by adding a party to the action. Such provision is made, however, in Pa. R. C. P. 2232(c), the pertinent part of which reads as follows:
"At any stage of an action, the court may order the joinder of any additional person who could have joined or who could have been joined in the action and may stay all proceedings until such person has been joined. . . ."
"An application under Pa. R. C. P. 2232(c) to join as a party any other person who could have joined or have been joined as such in the action shall be by petition and rule to show cause."