This is my fault because I messing with two css files. So I deleted both css files from the content folder. Replaced it again with just one Site.css file. Updated in _Layout.cshtml file, from shared folder, like so...
<link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
So now it is not updating. Just getting plain outlook, when runnung the program. Also tried with with Site.Master in shared folder...no luck, don't know where else to look.
Any sugguestion?