How to create the below model drop down in asp.net using C#
<p><img src="http://i.stack.imgur.com/IITzS.png" alt="enter image description here"></p>

<p>I am just learning .net and i wonder if it is possible to create drop lists like the one shown above or having a list type item where if + is pressed the item is expanded and when - is pressed again it minimizes.
<img src="http://i.stack.imgur.com/wnN3j.png" alt="
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Thank you</p>
