full url including .aspx

Hi

How can I get the full url like:
http://www.xxxxxx.com/AboutUs.aspx

I would like the .aspx to be added.  Cannot seem to figure out how to change this.  

nopCommerce 2.50 is the version Im using

Thank you

no one can tell me how to do this?  Or is it just not possible.  

Sorry, I am new to nopC so I am still learning how things work and when you cant find the answer, you ask :)

Thanks for any help

I want to know too...