I want to load the data from XML file and show in the listbox?

Question

I have a three classes:

First is Person:

    public class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
            


        

Answer 1

At some point you've got to instantiate personList.

In your code, you can't handle the Changed event on personList because it is still null.

So instead of

Persons personList = null;

Maybe try

Persons personList = new Persons();