Algo de kendo con css

This does the trick :-)

columns.Command(command =>
              {
                  command.Custom("Edit").Click("showDetails");
                  command.Custom("Delete").Click("DeleteDetails");
                  command.Custom("View").Click("ViewDetails");
              }).Title("Actions");


          .Events(e => e.DataBound("onRowBound"))


 <script type="text/javascript">
        function onRowBound(e) {
        $(".k-grid-Edit").find("span").addClass("k-icon k-edit");
        $(".k-grid-Delete").find("span").addClass("k-icon k-delete");
        $(".k-grid-View").find("span").addClass("k-icon km-view");
    }
</script>