Ok, in Visual Studio 2008, after simply dragging a RadDatePicker (Ajax) onto my form, I'm seeing the following warnings in the error list...
Validation (ASP.Net): Element 'DateInput' is missing required attribute 'runat'.
Validation (ASP.Net): Element 'Calendar' is missing required attribute 'runat'.
I imagine this is a bug with your control (probably in the [ToolboxData()] for the RadDatePicker class)
My question is: should I go ahead and manually add "runat='server'" for those tags in my declarative? Or is there some trick to make Visual Studio not display these warnings?