What Does Intellisense Mean?
IntelliSense is a code completion tool that is built into Microsoft Visual Studio. It is one of a number of similar tools that allow for intelligent code completion or intelligent text completion on different platforms.
Techopedia Explains Intellisense
Through the use of various algorithms, IntelliSense attempts to guess what the developer wants to type in order to complete a line of code. Using this tool may reduce typographical and syntactical errors.