[asp.net] Difference between AutoPostBack=True and AutoPostBack=False?

AutopostBack is a property which you assign to web controls if you want to post back the page when any event occurs at them.

You may see this article: What is AutoPostBack?

Autopostback is the mechanism, by which the page will be posted back to the server automatically based on some events in the web controls. In some of the web controls, the property called auto post back, which if set to true, will send the request to the server when an event happens in the control

For example, TextBox has AutoPostBack property

Use the AutoPostBack property to specify whether an automatic postback to the server will occur when the TextBox control loses focus. Pressing the ENTER or the TAB key while in the TextBox control is the most common way to change focus.