问如何判断代码是否运行在不使用System.Web的web服务器上？

EN

public bool IsWebServer {
        get {
            string file = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile.ToLower();

            //web.config used by asp.net 4.X, 
            //app.config used by MVC Core
            //NameOfTheApp.exe.config used by desktop applications
            if(file.Contains("web.config") || file.Contains("app.config")) {
                return true;
            }

            return false;
        }
    }

namespace My.Project
{
    public static HostingEnvironment
    {
        public static bool IsHosted { get; private set; }

        public static void SetIsHosted(this IServicesCollection services)
        {
            // you can grab any other info from your services collection
            // if you want.  This is an extension method that you call
            // from your Startup.ConfigureServices method

            IsHosted = true;
        }
    }
}

public void ConfigureServices(IServiceCollection services)
{
    // Set up whatever services you want here.
    // Make sure you have your My.Project namespace
    // in your using statements so you can use the IsHosted()
    // extension method

    services.SetIsHosted();
}