Question:
Some control, by default, does not cause an automatic PostBack, i.e TextChanged event of TextBox. Which property will you set for automatic postback of these types of controls?

Option A):
PostBack=true
Option B):
isPostBack=false
Option C):
AutoPostBack=true
Option D):
isPostBack=true

Correct Answer is Option C):
AutoPostBack=true

Explanation:
Some controls in ASP.NET, the AutoPostBack property is false by default, i.e TextBox, RadioButton, CheckBox control etc. For automatic postback of these controls default event you have to set AutoPostBack property to true.