Unable to open .aspx

Question

i'm first time create the ASP web application with using the C#... i can compile and run it... but when i try to open the .aspx from browser without VS.. i encounter error

This page contains the following errors:

error on line 1 at column 2: StartTag: invalid element name

Below is a rendering of the page up to the first error.

i understand i need to setup the IIS, but can anyone tell me step by step how to do it?