How to use linkbutton in repeater using C# with ASP.NET 4.5

In asp.net I have a table in database containing questions,date of submission and answers.On page load only questions appear.now i want to use any link which on clicking show answers and date specified in table data, either in textbox or label and clicking again on that link answer disappear again like expand and shrink on click.
So what coding should i use for this in C#?

Nested Repeaters in C#

Hi I have to display hierarchical information (which has four levels) within a repeater. For this I decided to use the nested repeater control.
I found this article on MSDN, http://support.microsoft.com/kb/306154 which shows how to use nested repeaters for two levels of information.
Can someone please help me extend this to four levels?
A sample code would be much appriciated. Thank you.