need help with MS VISUAL c++ string

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
                                 
                        
 
           Guy="Andrew";
 
 
             textBox1->Text = Guy;
 
                         }
        private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
            //Guy="Andrew"; Why not work without it? I dont want to write Guy value each time for each button for example :/ I want to declare it and its value just one time. How could i do that?
             textBox1->Text = Guy; 
 
                         }
 
         public:
 
                         System::String^  Guy;