I am developing web applications using asp.net 4.0 / Visual Studio 2010.
I have included the AJAX Control Toolkit in my web project - version 3.5.40412.0
I see there is a newer version of the kit which is 4.1.50731.
1. is it ok for me to continue using the 3.5? or is it best practice to use the latest?
2. Each time I upgrade to the newer version of ajax, I would need to retest everything that uses the toolkit controls, right?
3. I have an issue where I add the toolkit to the toolbox (as a new tab using choose items). I can add it just fine. But there are times where that tab simply isn't there anymore. So I have to readd it.
thank you for helping me!