How do you use appsettings.{Environment}.json in Azure?

Short answer: Create appsettings.Production.json, appsettings.Staging.json etc. Set ASPNETCORE_ENVIRONMENT in App Service → App Settings. ASP.NET Core automatically loads the appropriate file: var builder = WebApplication.CreateBuilder(args); builder.Configuration .AddJsonFile("appsettings.json") .AddJsonFile($"appsettings.{builder.Environment.EnvironmentName}.jso n", optional: true); Q&A

Real-world example (ShopNest)

ShopNest on Azure typically uses App Service + SQL Database + Blob Storage + Application Insights for monitoring.

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.