"Intellisense" is a form of "autocomplete" available for all .Net languages when the Visual Studio IDE (interactive development environment) is used.
Editing a .Net language Unicode source file in a text editor outside of Visual Studio does not provide Intellisense support.
Intellisense is available both in the Visual Studio programming window when creating a VisualAPL 'class library' or other compiled VisualAPL project and when the immediate-mode, interactive VisualAPL Cielo Explorer session is being used.