Easy example of intercepting method calls with proxies

For a few of my collegues, probably the first time they heard of intercepting methods by proxies was when the main developer of our E-Platform explained the communication BUS in this platform. I just noticed a link on asp.net which contains a very basic and very easily understandable example on how to use these proxies.

With proxies intercepting methods calls, you can transform the data transported, verify if a user is authorized to call the method and much more. You can find the example here.