Intellisense in the Debugger Windows Did you ever have to copy an item from the Watch window into the text editor just so you could use Intellisense to explore the item while debugging? If so, you'll appreciate all the new ways that Intellisense now works in debugger windows. IntelliSense is the technology that pops up context-sensitive hints and options while you are coding, and now while you are debugging as well. The Watch window, the Locals window, and even the Immediate window now provide full Intellisense support for your C# and Visual Basic debugging.