diff --git a/samples/MusicStore/ForTesting/Mocks/StartupOpenIdConnectTesting.cs b/samples/MusicStore/ForTesting/Mocks/StartupOpenIdConnectTesting.cs
index f890dd07b1..93046c53d4 100644
--- a/samples/MusicStore/ForTesting/Mocks/StartupOpenIdConnectTesting.cs
+++ b/samples/MusicStore/ForTesting/Mocks/StartupOpenIdConnectTesting.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using Microsoft.AspNetCore.Authentication.OpenIdConnect;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Builder;
@@ -6,6 +7,7 @@ using Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.AspNetCore.Localization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Configuration;
@@ -113,6 +115,16 @@ namespace MusicStore
 
         public void Configure(IApplicationBuilder app)
         {
+            // force the en-US culture, so that the app behaves the same even on machines with different default culture
+            var supportedCultures = new[] { new CultureInfo("en-US") };
+
+            app.UseRequestLocalization(new RequestLocalizationOptions
+            {
+                DefaultRequestCulture = new RequestCulture("en-US"),
+                SupportedCultures = supportedCultures,
+                SupportedUICultures = supportedCultures
+            });
+
             app.UseStatusCodePagesWithRedirects("~/Home/StatusCodePage");
 
             // Display custom error page in production when error occurs
diff --git a/samples/MusicStore/ForTesting/Mocks/StartupSocialTesting.cs b/samples/MusicStore/ForTesting/Mocks/StartupSocialTesting.cs
index c08db42f70..ffe81ad572 100644
--- a/samples/MusicStore/ForTesting/Mocks/StartupSocialTesting.cs
+++ b/samples/MusicStore/ForTesting/Mocks/StartupSocialTesting.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using Microsoft.AspNetCore.Authentication.OAuth;
 using Microsoft.AspNetCore.Authentication.Twitter;
 using Microsoft.AspNetCore.Authorization;
@@ -8,6 +9,7 @@ using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.AspNetCore.Localization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Configuration;
@@ -155,6 +157,16 @@ namespace MusicStore
 
         public void Configure(IApplicationBuilder app)
         {
+            // force the en-US culture, so that the app behaves the same even on machines with different default culture
+            var supportedCultures = new[] { new CultureInfo("en-US") };
+
+            app.UseRequestLocalization(new RequestLocalizationOptions
+            {
+                DefaultRequestCulture = new RequestCulture("en-US"),
+                SupportedCultures = supportedCultures,
+                SupportedUICultures = supportedCultures
+            });
+
             app.UseStatusCodePagesWithRedirects("~/Home/StatusCodePage");
 
             // Error page middleware displays a nice formatted HTML page for any unhandled exceptions in the request pipeline.
diff --git a/samples/MusicStore/Startup.cs b/samples/MusicStore/Startup.cs
index 8b56692141..2ca1de0f34 100644
--- a/samples/MusicStore/Startup.cs
+++ b/samples/MusicStore/Startup.cs
@@ -1,7 +1,9 @@
+using System.Globalization;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.AspNetCore.Localization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -170,6 +172,16 @@ namespace MusicStore
 
         public void Configure(IApplicationBuilder app)
         {
+            // force the en-US culture, so that the app behaves the same even on machines with different default culture
+            var supportedCultures = new[] { new CultureInfo("en-US") };
+
+            app.UseRequestLocalization(new RequestLocalizationOptions
+            {
+                DefaultRequestCulture = new RequestCulture("en-US"),
+                SupportedCultures = supportedCultures,
+                SupportedUICultures = supportedCultures
+            });
+
             // Configure Session.
             app.UseSession();
 
diff --git a/samples/MusicStore/StartupNtlmAuthentication.cs b/samples/MusicStore/StartupNtlmAuthentication.cs
index f4ba919c19..136ea1a864 100644
--- a/samples/MusicStore/StartupNtlmAuthentication.cs
+++ b/samples/MusicStore/StartupNtlmAuthentication.cs
@@ -1,10 +1,12 @@
 using System;
+using System.Globalization;
 using System.Security.Claims;
 using System.Security.Principal;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.AspNetCore.Localization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -95,6 +97,16 @@ namespace MusicStore
 
         public void Configure(IApplicationBuilder app)
         {
+            // force the en-US culture, so that the app behaves the same even on machines with different default culture
+            var supportedCultures = new[] { new CultureInfo("en-US") };
+
+            app.UseRequestLocalization(new RequestLocalizationOptions
+            {
+                DefaultRequestCulture = new RequestCulture("en-US"),
+                SupportedCultures = supportedCultures,
+                SupportedUICultures = supportedCultures
+            });
+
             app.UseStatusCodePagesWithRedirects("~/Home/StatusCodePage");
 
             // Error page middleware displays a nice formatted HTML page for any unhandled exceptions in the
diff --git a/samples/MusicStore/StartupOpenIdConnect.cs b/samples/MusicStore/StartupOpenIdConnect.cs
index 07d0f4fd4d..649d436126 100644
--- a/samples/MusicStore/StartupOpenIdConnect.cs
+++ b/samples/MusicStore/StartupOpenIdConnect.cs
@@ -1,7 +1,9 @@
+using System.Globalization;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.AspNetCore.Localization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -114,6 +116,16 @@ namespace MusicStore
 
         public void Configure(IApplicationBuilder app)
         {
+            // force the en-US culture, so that the app behaves the same even on machines with different default culture
+            var supportedCultures = new[] { new CultureInfo("en-US") };
+
+            app.UseRequestLocalization(new RequestLocalizationOptions
+            {
+                DefaultRequestCulture = new RequestCulture("en-US"),
+                SupportedCultures = supportedCultures,
+                SupportedUICultures = supportedCultures
+            });
+
             app.UseStatusCodePagesWithRedirects("~/Home/StatusCodePage");
 
             // Display custom error page in production when error occurs