ASP.NET bundles facilitate performance, because they reduce the number of HTTP requests. Using them is not required.
The Kendo.Mvc.UI namespace should be added in both web.config files (especially the one in the Views folder), otherwise you will receive server-side exceptions.
If you believe that the Kendo UI upgrade wizard has malfunctioned, please open a new support ticket for the VS Extensions product and provide the original project together with details on the unexpected behavior that you have observed.
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