Thank you for writing.
A project built with controls from 2011 should be easily updated to the latest version. If you have any difficulties doing so, please get back to us and we will be glad to assist you.
As to the Visual Studio 2012 designer, RadControls for WInForms are fully compatible with it
, so feel free to use VS2012 for your project.
I hope that you find this information useful.
the Telerik team
You’ve been asking for it and now it’s time for us to deliver. RadControls for WinForms Q3 2012 release is just around the corner. Sign up for a free webinar
to see first all the latest enhancements.