Appsettings.Development.json
appsettings.Development.json is an ASP.NET Core environment-specific JSON configuration file whose settings apply when the Development environment is active.
Building Web APIs with ASP.NET Core
appsettings.Development.json is an ASP.NET Core environment-specific configuration file whose settings apply to the Development environment and override or extend shared settings.
- How it is used
- Keeps development-only API settings separate from shared configuration, including the switch for detailed exception pages.
- How deep it goes
- Explains environment selection and file precedence, then walks through a configuration override and its use in `Program.cs`.
- Examples
- Uses a board-game API setting that enables the developer exception page in Development while leaving the shared value false.
- What you can do after
- Operate/configure it to override shared settings in Development and select the corresponding error-handling behavior.
Read how Building Web APIs with ASP.NET Core explains appsettings.Development.json →
.NET in Action, Second Edition
appsettings.Environment.json is the conventional ASP.NET Core configuration file whose Environment placeholder is replaced by the current environment name.
- How it is used
- Selects non-secret configuration values for the active ASP.NET Core environment and overrides shared appsettings.json values.
- How deep it goes
- Explains filename matching, loading precedence, and overrides, then demonstrates values through IConfiguration and a controller endpoint.
- Examples
- Uses Development and region values, a /config endpoint, and a TestOverwrite key to demonstrate successive overrides.
- What you can do after
- Operate/configure ASP.NET Core applications with environment-specific defaults and verify precedence through an HTTP configuration endpoint.
Read how .NET in Action, Second Edition explains appsettings.Development.json →
ASP.NET Core in Action, 3e
appsettings.Development.json is an ASP.NET Core environment-specific application configuration file containing settings for the Development environment.
- How it is used
- Configures runtime behavior specifically for the Development environment.
- How deep it goes
- Explains file location, optional loading, precedence, and environment selection, but does not detail JSON schema or individual setting types.
- Examples
- Uses appsettings.Development.json, appsettings.Staging.json, appsettings.Production.json, verbose logging, and conditional User Secrets.
- What you can do after
- Operate/configure environment-specific ASP.NET Core settings and understand which values override shared configuration.
Read how ASP.NET Core in Action, 3e explains appsettings.Development.json →
Related concepts
- appsettings.jsoncontrasts with · appsettings.json is a conventional JSON configuration file used by .NET applications to store application settings.
- ASP.NET Core environmentconfigured by · The ASP.NET Core environment is a named runtime setting, commonly specified by ASPNETCORE_ENVIRONMENT, that identifies the hosting context and controls environment-specific behavior and configuration.
- execution environmentconfigures · An execution environment is the computing context, including hardware, software, configuration, and supporting resources, in which programs run.
- JavaScript runtimeconfigured by · A JavaScript runtime is an execution environment that runs JavaScript code and provides the language engine and host APIs needed to interact with its platform.
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