Aspnetcore.docs: Update localization to 3.1

[DavidShukvani]

I have downloaded the example which is pointed out in the beginning of the article and it's outdated - version is 2.2 when the page is placed under version 3.1 and when I open up the page I get aggregated exceptions which is basically about NullReferenceException.
So please, either fix the existing example, so that it won't throw some strange un-debuggable (or at least hard-to-debug-for-newbie) exceptions, or upload the new version which will be applicable to version 3.1.
Thanks!

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Document Details

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• ID: d1833676-ff1b-c587-cc9c-81afffa8ef68
• Version Independent ID: ad989395-3f49-4d55-521e-cf6fe56281ee
• Content: Globalization and localization in ASP.NET Core
• Content Source: aspnetcore/fundamentals/localization.md
• Product: aspnet-core
• Technology: aspnetcore-fundamentals
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[DavidShukvani]

and this is the stacktrace:
System.AggregateException: One or more errors occurred. (Object reference not set to an instance of an object.) ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.AddRequestHeaders(IHttpSocketAdapter httpSocket, String requestId, Boolean isHttps, String hostUrl) at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.<>c__DisplayClass9_0.<<GetSocketConnectionToHost>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.CreateSocketConnectionAsync() at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.Microsoft.VisualStudio.Web.BrowserLink.IHttpSocketAdapter.WriteToRequestAsync(Byte[] buffer, Int32 offset, Int32 count) at Microsoft.VisualStudio.Web.BrowserLink.ScriptInjectionFilterStream.FirstWriteToInjectScriptSocketAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken) --- End of inner exception stack trace --- at System.Threading.Tasks.Task 1.GetResultCore(Boolean waitCompletionNotification) at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.System.IDisposable.Dispose() at Microsoft.VisualStudio.Web.BrowserLink.ScriptInjectionFilterStream.Dispose(Boolean disposing) at System.IO.Stream.Close() at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.ExecuteWithFilter(IHttpSocketAdapter injectScriptSocket, String requestId, HttpContext httpContext) at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) ---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.AddRequestHeaders(IHttpSocketAdapter httpSocket, String requestId, Boolean isHttps, String hostUrl) at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.<>c__DisplayClass9_0.<<GetSocketConnectionToHost>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.CreateSocketConnectionAsync() at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.Microsoft.VisualStudio.Web.BrowserLink.IHttpSocketAdapter.WriteToRequestAsync(Byte[] buffer, Int32 offset, Int32 count) at Microsoft.VisualStudio.Web.BrowserLink.ScriptInjectionFilterStream.FirstWriteToInjectScriptSocketAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)<--- fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[3] An exception was thrown attempting to display the error page. System.AggregateException: One or more errors occurred. (Object reference not set to an instance of an object.) ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.AddRequestHeaders(IHttpSocketAdapter httpSocket, String requestId, Boolean isHttps, String hostUrl) at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.<>c__DisplayClass9_0.<<GetSocketConnectionToHost>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.CreateSocketConnectionAsync() at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.Microsoft.VisualStudio.Web.BrowserLink.IHttpSocketAdapter.WriteToRequestAsync(Byte[] buffer, Int32 offset, Int32 count) --- End of inner exception stack trace --- at System.Threading.Tasks.Task.WaitAllCore(Task[] tasks, Int32 millisecondsTimeout, CancellationToken cancellationToken) at System.Threading.Tasks.Task.WaitAll(Task[] tasks) at Microsoft.VisualStudio.Web.BrowserLink.ScriptInjectionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.IO.StreamWriter.Write(String value) at Microsoft.AspNetCore.Diagnostics.RazorViews.ErrorPage.ExecuteAsync() at Microsoft.Extensions.RazorViews.BaseView.ExecuteAsync(HttpContext context) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) ---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.AddRequestHeaders(IHttpSocketAdapter httpSocket, String requestId, Boolean isHttps, String hostUrl) at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.<>c__DisplayClass9_0.<<GetSocketConnectionToHost>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.CreateSocketConnectionAsync() at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.Microsoft.VisualStudio.Web.BrowserLink.IHttpSocketAdapter.WriteToRequestAsync(Byte[] buffer, Int32 offset, Int32 count)<--- fail: Microsoft.AspNetCore.Server.Kestrel[13] Connection id "0HM0371PN8G0G", Request id "0HM0371PN8G0G:00000002": An unhandled exception was thrown by the application. System.AggregateException: One or more errors occurred. (Object reference not set to an instance of an object.) ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.AddRequestHeaders(IHttpSocketAdapter httpSocket, String requestId, Boolean isHttps, String hostUrl) at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.<>c__DisplayClass9_0.<<GetSocketConnectionToHost>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.CreateSocketConnectionAsync() at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.Microsoft.VisualStudio.Web.BrowserLink.IHttpSocketAdapter.WriteToRequestAsync(Byte[] buffer, Int32 offset, Int32 count) --- End of inner exception stack trace --- at System.Threading.Tasks.Task 1.GetResultCore(Boolean waitCompletionNotification) at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.System.IDisposable.Dispose() at Microsoft.VisualStudio.Web.BrowserLink.ScriptInjectionFilterStream.Dispose(Boolean disposing) at System.IO.Stream.Close() at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.ExecuteWithFilter(IHttpSocketAdapter injectScriptSocket, String requestId, HttpContext httpContext) at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Server.IISIntegration.IISMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.Builder.Extensions.UsePathBaseMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication 1 application) ---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.AddRequestHeaders(IHttpSocketAdapter httpSocket, String requestId, Boolean isHttps, String hostUrl) at Microsoft.VisualStudio.Web.BrowserLink.BrowserLinkMiddleware.<>c__DisplayClass9_0.<<GetSocketConnectionToHost>b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.CreateSocketConnectionAsync() at Microsoft.VisualStudio.Web.BrowserLink.DelayConnectingHttpSocketAdapter.Microsoft.VisualStudio.Web.BrowserLink.IHttpSocketAdapter.WriteToRequestAsync(Byte[] buffer, Int32 offset, Int32 count)<--- info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2] Request finished in 2083.9709ms 500

[Rick-Anderson]

@DavidShukvani try removing browserlink.

[Rick-Anderson]

@hishamco any chance you could make a
https://github.com/dotnet/AspNetCore.Docs/tree/master/aspnetcore/fundamentals/localization/sample/3.x folder and copy the samples over and update to 3.1?

[hishamco]

Sure, hope to push a PR ASAP

[Rick-Anderson]

Fixed in #18556