How to dynamically update ASP.NET DropDownList using jQuery AJAX

Hi everyone, I'm working on an ASP.NET Web Forms project, and I have a DropDownList that I want to update dynamically based on the selection of another DropDownList. I want to use jQuery AJAX to fetch the data from the server without refreshing the page. Could anyone provide a simple example of how to achieve this in ASP.NET Web Forms? Also, what is the best way to handle the server-side method to return JSON data for the DropDownList? Thanks in advance!