wy te fuk ths no working?

Boolean gleich(Int32 zahl) {
    if (zahl == Convert::ToInt32(textBox1->Text))
        return true;

    else
        return false;
}

    private:
        List<Int32> ^liste;

private: System::Void buttonSuchen_Click(System::Object^  sender, System::EventArgs^  e) {

    Int32 pos;
   
    if(radioButtonKleiner->Checked == true){
    Predicate<Int32> ^suchen = gcnew Predicate<Int32>(&generischeListeFormular::Form1::kleiner);
    }
}

it gives me a C3352 error but wy?