I'll describe my problem that looks really strange. I convert the Sitefinity Community Edition 3.7 into .Net 4.0 framework with VS 2010 and I get an error in the news module (for DynamicHyperLink). the error was:
'DynamicHyperLink' is an ambiguous reference between 'Telerik.Cms.Web.UI.DynamicHyperLink' and 'System.Web.DynamicData.DynamicHyperLink'
so instead of DynamicHyperLink
I make an inheritance like this - Telerik.Cms.Engine.WebControls.DynamicHyperLink
But when I'm trying to edit a page
the web controls are not rendering the error of every control is Object reference not set to an instance of an object.
I can not see the content of the control. Every control that is dragged shows the same error.
Is this caused with the conversion or .... ???