I would like to add an inline style to the last LI that is generated with the ASP:repeater control.
I can't add a css class, i need to some how count the last li with the class called:
class="tile lower-boxes icon_email"
If I've understood your question, then the following should work for you:
$(".tile.lower-boxes.icon_email:last").css("color", "#C00");
Obviously, that selector and the CSS method can be changed to your needs. You can also add a class to the element, which would be preferable:
$(".tile.lower-boxes.icon_email:last").addClass("foo");
More info on the :last selector.