Read environment variables in ASP.NET Core
asp.net, asp.net-core, asp.net-core-mvc, kestrel-http-server
Solution
Your problem is spaces around `=`.
This will work (attention to space before closing quote):
Console.WriteLine(Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT "));
The space after `ASPNETCORE_ENVIRONMENT` in this code is not a typo! The problem in the question was having extra space (in SET...), so you must use the same space in GetEnvironmentVariable().
As noted by Isantipov in a comment, an even better solution is to remove the spaces entirely from the SET command:
set ASPNETCORE_ENVIRONMENT=Production
Problem
Running my ASP.NET Core application using DNX, I was able to set environment variables from the command line and then run it like this: ``` set ASPNET_ENV = Production dnx web ``` Using the same approach in 1.0: ``` set ASPNETCORE_ENVIRONMENT = Production dotnet run ``` does not work - the application does not seem to be able to read environment variables. ``` Console.WriteLine(Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT")); ``` returns null What am I missing?