How to make a RSS Feed page??

Hi,
I want to make a page something like this http://techahead.wordpress.com/rss/ means i want to make rss feed for my website. Whener anybody type www.mywebsite.com/rss/ then this type of page will be displayed. /rss/ i can manage by putting all the files in this folder. BUT how to make RSS and then how to represent that rss in this type of format. and also if i want to display RSS feeds like GMAIL displaying on their home page BOTTOM AREA. then how can i make same functinalities in ASP.NET
Please tell me i know RSS but d't know how to make RSS in ASP.NET like techahead and gmail have .
 
Thanks.

...