how to return a function value from one class to another ?

Question

i have returned an array from a function defined in one class to another but the values are missing . the code is:-

 

class a

{

        private string[,,,] allcontrols{...function body ...}

        public string head=>allcontrols().clone();

 

      private void btn1_click(.......)

      {

            string[,,,] cl= allcontrols();

            messagebox.show(cl[0,1,0,0]);    ///the value is shown ....

      }

}

 

class b

{

      public static void main(.......) 

        { 

        a aa=new a(); 

       string[,,,]hh= aa.head;

       var str =hh.getvalue(0,1,0,0) .tostring();

       messagebox.show(str);

      } 

 

} 

 

//how to get values ......