Styles.css to html

My styles.css file is not working with my index.html file to style my mark up. It was working now its not. I have created the link

Can you post the html and css code?

How do I post my write up.

did you link it if no then type

<link rel="stylesheet" type="text/css" href="css file name">

Copy the code from the editor en post it here.

paste it were you type your message