I have created css file called stylesheet1.css in folder called Mystyles. See image below
I want to refer css file in my visual studio in one of my .aspx page, so i wrote something like this but its not using this stylesheet
<link href="~sitecollection/_catalogs/masterpage/MyStyles/Stylesheet1.css" />
Please can someone tell how can i refer this? Also could be nice if there are any articles which i can read about to get idea about referring images and css files in sharepoint in different ways.