Thank you for contacting us.
It seems you have hit an issue where the assembly references are removed for projects in which UI for ASP.NET AJAX
and UI for ASP.NET MVC
components are used together. The references are removed when using the Upgrade wizard
for one of the products. As a workaround of the problem I would suggest to use the Upgrade wizard
to upgrade the UI for ASP.NET MVC
resources. After the upgrade process is completed add the UI for ASP.NET AJAX
resources manually. The following address will guide you how to do that: LINK
Please let us know if any assistance is needed.
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