Why should you care?

Slow pages lose users. These techniques appear in every serious .NET performance review.

See it live — copy this example

Create an MVC project (dotnet new mvc), add the code, and run dotnet run.

// Output Caching — ShopNest.Mvc example
public class HomeController : Controller
{
    public IActionResult Index() => View();
}

Run Example »

Edit the code and click Run — like W3Schools Try it Yourself.

What happened?

• Study the example line by line.
• Each part connects to Output Caching.
• Edit one line, save, and run dotnet run to see what changes.

Try it yourself

1. Apply one optimization from the example.
2. Measure before and after with simple timing or logs.
3. Avoid optimizing before you have a real bottleneck.
4. Change text or labels in the example and run again — watch the browser update.
5. Break the code on purpose (remove a semicolon), read the error message, then fix it.

Remember

You learned what Output Caching is and when to use it. Practice by changing the example yourself. Explain it in your own words before moving on.