It is contended that the plaintiff has attempted to join an individual cause of action in his favor for damages with an action, which he prosecutes as taxpayer in favor of himself and all others similarly situated, for an injunction to restrain defendants from using the school houses to' conduct the alleged private businesses. The allegations of the complaint are that the plaintiff has been damaged in his private business, for which he seeks to be compensated. Can such a cause of action be joined with the equitable relief sought by the plaintiff as representative of a class, namely, the taxpayers of the city of Milwaukee? Sec. 2647, Stats., prescribes what causes of action may be united, in the complaint. “But the causes of action so united must all belong to one of these classes and must affect all the parties to the action. ...” The complaint before us seeks to unite an action in equity, prosecuted by the plaintiff in his representative capacity of citizen and taxpayer of the city of Milwaukee in behalf of himself and all others similarly situated, and an action in his individual capacity to recover damages which he personally claims to have suffered through the acts of the defendants. No one except the plaintiff has any interest in' his *42personal action, while the equitable cause of action for an injunction is in favor of a large number of persons whom he represents as a class. As held in Hawarden v. Youghiogheny & L. C. Co. 111 Wis. 545, 87 N. W. 472, “Potentially all of the class are parties.” Such an action cannot be united in the same complaint with an action which is brought to redress the personal wrongs of the plaintiff. “The two causes of action would not both belong to any one of the classes specified in sec. 2647, Stats. 1898, nor would they both affect all parties to the action, as required by that section.” Luther v. C. J. Luther Co. 118 Wis. 112, 94 N. W. 69, and cases cited.
The trial court held that the complaint' does not allege sufficient facts to constitute a cause of action on the ground that the board of school directors of the city of Milwaukee is au- ■ thorized to permit defendants such use of the school buildings as is set forth in the complaint. The court based its decision on the provisions of ch. 459, Laws of 1907, and sec. 435e, Stats. 1913.
The buildings erected for the public schools are to be demoted to the purposes contemplated by the statutes of maintaining the public schools in providing popular instruction. The legislature has by law made provision to promote the cause of popular education by the organization of local school authorities and conferred on them the power to raise by general taxation the money required to acquire school-house sites and for building school houses, and imposed upon school boards the duties of maintaining the required schools and to devote these school properties to school purposes and manage them as prescribed by law. The allegations of the complaint are in effect' that the school directors of the city of Milwaukee granted the defendants permission to use the school buildings of the city for the purpose of conducting private school-book and supply businesses for their personal profit. Do the statutes authorize the use of the public school buildings 'for conducting such private school businesses for personal profit? *43We have discovered no provision in the statute that confers any authority on school officers to grant the use of school houses-for such a private purpose, unless such authority is granted hy the acts on which the trial court based its decision. Oh. 459, Laws of 1907, is “An act relating to school hoards and common and high schools in cities of the first class.” Sec. 18 thereof provides: “The hoard shall he governed in all things hy the school laws of the state, except as they are altered or modified hy this act.” The trial court considered that sec. 8 of this act, providing that the hoard may adopt a uniform system of instruction and that the hoard “shall adopt at its discretion, and modify or repeal, hy-laws, rules and regulations for its own government, and for the organization, discipline and management of the public schools under its control, and generally adopt such measures as shall promote the good order and public usefulness of said schools; provided that such hy-laws, rules and regulations shall not conflict with the constitution and laws of the state,”- conferred such authority. The context of this portion of the law clearly indicates that the power of making regulations as therein conferred was intended to include such regulations as were appropriate to promote good order, furnish useful and efficient instruction, and such management of the school properties as would accomplish the purposes of providing the contemplated public education. If the complaint alleged a state of facts which showed that the school hoard in their official capacity were furnishing books and supplies to pupils as an incident to a successful and. efficient conduct of the public schools, we would then have presented to us an entirely different case from the one presented hy the alleged fact's in this complaint. The facts alleged in the complaint present a case wherein the defendants are charged with conducting “regular stores in the high school buildings under their charge and control wherein they have sold drawing instruments, school hooks, stationery, and blanks for a profit above the cost of such articles,” and that they so *44use the buildings without paying any compensation therefor. It is not charged that the alleged use of these school houses by defendants in any way interferes with the use of the buildings for school purposes.' We find nothing in the part of the statute heretofore quoted nor in the provision of sec. 43 5 e, Stats. 1913, indicating a legislative intent to confer authority on the school boards of this state to permit the school houses within their control to be used for the conduct of private businesses such as the defendants are alleged to be conducting for their personal profit. We think that school boards have not been granted authority to permit school buildings to be devoted to uses other than to school purposes, aside from 'those uses expressly enumerated in the statutes. The rule which was enforced under the statutes in the case of School Dist. v. Arnold, 21 Wis. 657, has not been modified by subsequent enactments by the legislature nor by the decisions in the cases of Bell v. Platteville, 71 Wis. 139, 36 N. W. 831; Stone v. Oconomowoc, 71 Wis. 155, 36 N. W. 829; and State v. Eau Claire, 40 Wis. 533. These decisions in no way referred to the extent or the nature of the authority conferred on school boards, nor did they in principle involve the questions here presented under the statutes regulating the government and management of the public schools. The Arnold Case was adhered to in State ex rel. Weiss v. District Board, 76 Wis. 177, 44 N. W. 967.
The trial court erred in sustaining the demurrer on the ground that the complaint does not state facts sufficient to constitute a cause of action. The complaint states a good cause of action for relief to restrain the defendants from using the school buildings to conduct their private businesses for profit as alleged in the complaint. The plaintiff as a taxpayer and resident of the city is a proper party to prosecute the action for himself and all others similarly situated.
Since the complaint embraces a cause of action for recovery of plaintiff’s personal damages, it follows that the com*45plaint improperly unites this cause -of action with a cause of action in equity for injunetional relief, and the demurrer on that ground should have been sustained and the demurrer on the ground that the complaint failed to state a cause of action should have been overruled; but since the plaintiff is the successful party on this appeal, he is entitled to recover his costs in this court, although the order appealed from, under the circumstances, must be affirmed on grounds other than those on which the trial court acted.
By the Gourt. — The order appealed from is affirmed.