Element "telerik:RadDatePicker" is not a known element message comes while developing stitifinity widget
I was getting element is not known element while creating DatePicker widget. I have followed the steps which are there @ docs.sitefinity.com/tutorial-create-a-date-picker-widget .
Can someone help me why I am getting this message.
I encountered the same. Try closing and reopen the project, you should be able to build.
It looks like you have found a solution. Please get back to us if you need further assistance in this area.