Model Binding in MVC/Razor Pages?

Short answer: Automatically maps form values, query strings, route data to C# model properties. public IActionResult Submit(User user) { ... } Binds complex types and simple types out-of-the-box.

Real-world example (ShopNest)

ShopNest registers AppDbContext as Scoped and IMemoryCache as Singleton. Putting DbContext in a Singleton causes threading bugs.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.