.Net Custom Attributes

One of my friend asked me question about custom attributes. He wanted to know the scenarios where it should be used and why. I was looking to find him a good link/tutorial and found this great article at TechRepublic which has a sample solution for download as well.

Definition:
Attributes allow you to add descriptions to classes, properties, and methods at design time that can then be examined at runtime via reflection.

Link: http://articles.techrepublic.com.com/5100-10878_11-6175490.html?tag=rbxccnbtr1