What Language is used to build HoloLens Apps

Question

Someone just asked me via an email: What is the programming language used to build HoloLens apps?

 

A HoloLens app is a Universal Windows App that is developed using Universal Windows Platform. The main language to build a WUP app is C# and XAML.

 

For more details, check out > What do I need to build a HoloLens app