I have 2010.2 installed now. I am using the 3.5 controls. I see that 4.0 controls are now available. Is there an easy way to convert the project (many pages) to use the 4.0 controls?
There is a new Version Utility in 2010.2 that you can use to make this switch. Once you pass it your source (solution, product, website), it'll analyze and recommend upgrading to 2010.2 3.5, but you can select the Upgrade Options and change it to upgrade to CLR4.0, and then select 2010.2 from the drop-down.