VSCode is written in TypeScript and JavaScript. First, its core code base is written in TypeScript, an open source programming language that extends JavaScript and adds type checking capabilities. Secondly, some extensions and plug-ins of VSCode are written in JavaScript. This combination makes VSCode a flexible and extensible code editor.

VSCode language writing
Answer: VSCode is written in TypeScript and JavaScript.
Detailed description:
VSCode is an open source code editor developed by Microsoft, known for its rich functionality and customizability. Due to its open source nature, one can see the code foundation behind it.
The core code base of VSCode is written in TypeScript. TypeScript is an open source programming language developed by Microsoft that extends JavaScript and adds type checking capabilities. This type checking helps improve the reliability and maintainability of the code.
Some extensions and plug-ins for VSCode are written in JavaScript. JavaScript is a popular web development language and is also widely used to write back-end and desktop applications.
By using TypeScript and JavaScript, the VSCode team was able to create a flexible and extensible code editor that could be used in a variety of development scenarios.
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