Howto get live detailed info about all online visitors of your website

If you ever had 'Online visitor counter' feature on your website, at some point of time, you have undoubtedly asked yourself: "who are those 17 people that are currently browsing my precious website ?" "What are their IP addresses? When did they come here, what page they first opened and from where did they came from?" Here is the complete tutorial on how to display detailed list of all visitor currently browsing your ASP.NET website.