How to Setting IHostingEnvironment.IsDevelopment as True in an ASP.NET 5 Application

http://www.tugberkugurlu.com/archive/setting-ihostingenvironment-isdevelopment-as-true-in-an-asp-net-5-application vs2015 里程序设置的方法 2.When you are on Visual Studio 2015, you can handle this better by adding a launchSettings.json file as here. VS will pick this up and set the environment variable for IIS Express process. https://github.com/aspnet/live.asp.net/blob/c1a75fd398ac85b03c6fdd153f6e9713e40b67bd/src/live.asp.net/Properties/launchSettings.json.