Following are the steps to be done:-
		
				
						- In ASPX page you have to add Item template tag in data grid.
						
								<ItemTemplate>
								<asp:CheckBox id="CheckBox1"
runat="server" AutoPostBack="True"
OnCheckedChanged="Check_Clicked"></asp:CheckBox>
								</ItemTemplate>
						 
				 
		 
		
				
		
		If you look at the Item template, we have “OnCheckChanged” event. This “OnCheckChanged” event has “Check Clicked” subroutine is actually in behind code. Note this method, which is in behind code, should either be “protected” or “public”
		
				
		
		Following below is the subroutine, which defines the method
		
				
		
		
				
						
								Protected Sub Check Clicked
(By Val sender As Object, By Val e As EventArgs)
								‘Do something
								End Sub
						 
				 
		 
		
				
		
		Above is the 
ASP.NET 
interview questions & also see the following video on Authentication, 
Authorization, Principal and Identity objects: -