I have created a new empty ASP.NET MVC 4 project, and added a new folder Shared in View and new file _Layout.cshtml and put this code to that
<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>@ViewBag.Title</title>
<script src="@Url.Content("~/Content/style.css")"></script>
</head>
<body>
@RenderBody()
</body>
</html>
and now when I add new view for a controller it doesn't detect it as master page automatically as well as Basic Template
@{
ViewBag.Title = "AboutUs";
}
<h2>AboutUs</h2>
it doesnt get _Layout.cshtml file as master page until I set that manually with Layout = "~/Views/Shared/_Layout.cshtml";