I have been using the example KendoUI MVC4 samples with generally good success. However, some of the CSS styles such as k-add-button, k-edit-button and k-update-button show up as 'Unknown CSS class ...' in Visual Studio editor in my Razor view files. I could not find where these styles are defined, either in my project or in the KendoUI distribution. Since I am having a problem with the ListView MVC 4 example (the 'Add new record' button does not work), I suspect it may be related to the undefined k-add-button style. My _Layout.cshtml file contains the following references:
<link href="@Url.Content("~/Content/kendo/2013.2.716/kendo.common.min.css")" rel="stylesheet" type="text/css" /><link href="@Url.Content("~/Content/kendo/2013.2.716/kendo.dataviz.min.css")" rel="stylesheet" type="text/css" /><link href="@Url.Content("~/Content/kendo/2013.2.716/kendo.default.min.css")" rel="stylesheet" type="text/css" /><link href="@Url.Content("~/Content/kendo/2013.2.716/kendo.dataviz.default.min.css")" rel="stylesheet" type="text/css" /><script src="@Url.Content("~/Scripts/kendo/2013.2.716/jquery.min.js")"></script><script src="@Url.Content("~/Scripts/kendo/2013.2.716/kendo.all.min.js")"></script><script src="@Url.Content("~/Scripts/kendo/2013.2.716/kendo.aspnetmvc.min.js")"></script>