Configuration 1.x 迁移 2.0 https://docs.microsoft.com/zh-cn/aspnet/core/migration/1x-to-2x/

samples/WebApplicationSample/Startup.cs

@@ -13,16 +13,9 @@ namespace WebApplicationSample
     {
         public IConfiguration Configuration { get; }
 
-        public Startup(IHostingEnvironment env)
+        public Startup(IConfiguration configuration)
         {
-            var builder = new ConfigurationBuilder();
-
-            if (env.IsDevelopment()) // 添加用户机密
-            {
-                builder.AddUserSecrets<Startup>();
-            }
-
-            Configuration = builder.Build();
+            Configuration = configuration;
         }
 
         public void ConfigureServices(IServiceCollection services)