React to Hosting API changes.

samples/HttpOverridesSample/Startup.cs

@@ -35,6 +35,7 @@ namespace HttpOverridesSample
         {
             var application = new WebApplicationBuilder()
                 .UseConfiguration(WebApplicationConfiguration.GetDefault(args))
+                .UseIISPlatformHandlerUrl()
                 .UseStartup<Startup>()
                 .Build();
 

samples/ResponseBufferingSample/Startup.cs

@@ -39,6 +39,7 @@ namespace ResponseBufferingSample
         {
             var application = new WebApplicationBuilder()
                 .UseConfiguration(WebApplicationConfiguration.GetDefault(args))
+                .UseIISPlatformHandlerUrl()
                 .UseStartup<Startup>()
                 .Build();
 

samples/ResponseBufferingSample/project.json

@@ -2,6 +2,7 @@
   "version": "1.0.0-*",
   "dependencies": {
     "Microsoft.AspNet.Buffering": "1.0.0-*",
+    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-*",
     "Microsoft.AspNet.Server.Kestrel": "1.0.0-*"
   },
   "compilationOptions": {