ASP.NET Web应用程序中的C＃递归：在列表框中显示静态方法中的数字

I'm trying to learn recursion in C#. I am able to do a simple count down in a console application, but I am not sure how to do the same thing in an ASP.NET web application. I would like to display the result in a listbox, but I cannot access the listbox in a static function.I'm trying to learn recursion in C#. I am able