# Adding Models

A TypeScript class describes the shape of your data, and strict checking makes you decide how each property gets its value.

![Cheat sheet: Adding Models](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/fab3b4e72d8f4efe807e77738adc802b.webp)

- Category: TypeScript
- Level: Apprentice
- Tags: Class in TypeScript, Definite Assignment Assertion, Optional Property, typescript
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/csharp-working-with-typescript-adding-models-cheat-sheet