Advanced Development in C# Advanced

Lessons in this section

1. Nullable Reference Types

   Make null visible to the compiler: nullable context, string vs string?, warnings, null checks, !, ??, ??=, nullable attributes, legacy code and avoiding NullReferenceException.

2. Logging

   Record what your app does: ILogger, log levels, structured logging, providers, console and file logging, exception logging, diagnostics, debugging, tracing and metrics.

3. HttpClient and JSON

   Call web APIs and handle JSON: HttpClient, GET, POST, PUT and DELETE, headers, responses, System.Text.Json serialization, options, attributes, typed clients and error handling.