Commented Unassigned: AjaxControlToolkit ValidatorCalloutExtender does not work with UnobtrusiveValidation [28018]

Hi,

I have a WebForms application. If I target the application to use .NET 4.6 framework, the ValidatorCalloutExtender does not work. If I switch off the UnobtrusiveValidation, the validation works fine. We don't want to turn off the UnobtrusiveValidation setting. Is there any other solution?

Thank you.
Comments: Thank you for all the explanations.