No matter when or where I set either ASPNET_ENV or Hosting:Environment the startup code will always enter
//This method is invoked when ASPNET_ENV is 'Production'
//The allowed values are Development,Staging and Production
public void ConfigureProduction(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole(minLevel: LogLevel.Warning);
Configure(app);
}

What I've tried so far
Hosting:Environment to Development in the project propertiesASPNET_ENV to Development in the project propertiesHosting:Environment to Development in launchSettings.json
ASPNET_ENV to Development in launchSettings.json
ASPNET_ENV to Development in code via Environment.SetEnvironmentVariable("ASPNET_ENV", "Development"); in the Startup method before the call to ConfigurationBuilder.GetEnvironmentVariables()
This is version 1.0.0-rc2-20143 by the way. Am I missing something here or is it just a bug?
ASP.NET Core apps configure and launch a host. The host is responsible for app startup and lifetime management. At a minimum, the host configures a server and a request processing pipeline. The host can also set up logging, dependency injection, and configuration.
Built-In Environments in . When checking the ASP.NET core project template, you should see that the “ASPNETCORE_ENVIRONMENT” variable with the value “Development” is set by default. Those are three values that are used by convention: Development, Staging, and Production.
If you need to check whether the application is running in a particular environment, use env. IsEnvironment("environmentname") since it will correctly ignore case (instead of checking if env. EnvironmentName == "Development" for example).
The environment variable name has been changed to ASPNETCORE_ENVIRONMENT as part of the name change.
It was announced in this issue and change in this PR.
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