Deploy self-contained trimmed builds for smaller binaries. Example for build optimization: dotnet publish -c Release /p:PublishTrimmed=true /p:ReadyToRun=true 🔐 10. What is Data Protection in ASP.NET Core? Follow :

ASP.NET Core Data Protection API provides secure cryptographic APIs for:

• Encrypting cookies and tokens
• Protecting form data
• Persisting secure keys (across app restarts)

Setup:

builder.Services.AddDataProtection()

.PersistKeysToFileSystem(new DirectoryInfo(@"c:\keys"))

.SetApplicationName("MyApp");

You can use it directly:

var protector = _provider.CreateProtector("MyPurpose");

var encrypted = protector.Protect("secret-data");

var decrypted = protector.Unprotect(encrypted);

✅ Data Protection is the backbone for:

• Cookie Authentication
• CSRF Tokens
• TempData encryption

🧠 Summary

Concept Description Best For

In-memory caching Stores data in server memory Single-server or dev

Distributed caching Shared cache (Redis, SQL) Scalable apps

Response caching Caches HTTP responses Public/static data

Follow :

Output caching (.NET 8) Advanced, user-aware

caching

Dynamic APIs

Response compression Gzip/Brotli for responses Large payloads

Async/await Non-blocking I/O High concurrency

Startup optimization Faster app boot Cloud apps

Data protection Encrypt sensitive data Cookies, tokens,

forms

Testing

How to Unit Test Controllers?

Unit testing controllers ensures your business logic in action methods works correctly

without hitting the database or HTTP pipeline.

Steps: