Environment Configuration in ASP.NET Core
Use Development/Staging/Production with appsettings.{Env}.json.
Use Development/Staging/Production with appsettings.{Env}.json.
Cache aggressively where safe; reduce allocations and queries.
Build modern cross-platform web apps and APIs with ASP.NET Core.
Know Program.cs, Controllers/Pages, wwwroot, and appsettings*.json.
Implement IActionFilter or ActionFilterAttribute for reusable logic.