[Blazor WASM] CultureInfo.DisplayName not consistent

[enricobenedos]

Describe the bug

CultureInfo DisplayName property does not return a consistent value in Blazor WASM projects.

To Reproduce

Example:

var enCulture = new CultureInfo("en-US");
Console.WriteLine(enCulture.DisplayName);

Actual Value
en (US)

Expected Value
English (United States)
(as described in https://docs.microsoft.com/en-us/dotnet/api/system.globalization.cultureinfo.displayname?view=net-5.0)

Exceptions (if any)

No exceptions.

Further technical details

• .NET 5.0
• Include the output of dotnet --info

 dotnet --info
.NET SDK (reflecting any global.json):
 Version:   5.0.301
 Commit:    ef17233f86

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19043
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\5.0.301\

Host (useful for support):
  Version: 5.0.7
  Commit:  556582d964

.NET SDKs installed:
  5.0.301 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.16 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.16 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

• The IDE (VS / VS Code/ VS4Mac) you're running on, and its version

Microsoft Visual Studio Professional 2019
Version 16.10.3

[javiercn]

@enricobenedos thanks for contacting us.

Have you setup <InvariantGlobalization>false</InvariantGlobalization> in your MSBuild project file?

[enricobenedos]

This is my project file with the new InvariantGlobalization as suggested:

<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
    <DockerfileContext>.</DockerfileContext>
    <AssemblyVersion>0.1.0.0</AssemblyVersion>
    <FileVersion>0.1.0.0</FileVersion>
    <Version>0.1.0</Version>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Blazored.LocalStorage" Version="4.1.1" />
    <PackageReference Include="FmsAgvShared" Version="1.10.2" />
    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="5.0.7" />
    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Authentication" Version="5.0.7" />
    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="5.0.7" PrivateAssets="all" />
    <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="5.0.7" />
    <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
    <PackageReference Include="Microsoft.Extensions.Localization" Version="5.0.7" />
    <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.10.13" />
    <PackageReference Include="NetTopologySuite.IO.GeoJSON4STJ" Version="2.1.1" />
    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.11.1" />
    <PackageReference Include="System.Net.Http.Json" Version="5.0.0" />
    <PackageReference Include="Telerik.UI.for.Blazor" Version="2.24.1" />
  </ItemGroup>

  <PropertyGroup>
	<BlazorWebAssemblyLoadAllGlobalizationData>true</BlazorWebAssemblyLoadAllGlobalizationData>
	<UserSecretsId>02d32efe-6558-4f81-b5a4-b35602ac9c1d</UserSecretsId>
	<InvariantGlobalization>false</InvariantGlobalization>
  </PropertyGroup>	
	
</Project>

but nothing has changed.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[svick]

Blazor WASM has its own cut-down version of culture data, and, as I understand it, that excludes culture names. (Though that article does not explicitly mention DisplayName for some reason.) I think that explains the behavior you see.

[enricobenedos]

Hi @svick,
probably you are right. But I think that Blazor WASM as frontend framework cannot miss the DisplayName feature.
I understand that it is for performance purposes but at this point I think that it can be solved using an adjunctive dependency that include the right cultures names. So every developer can decide if include it on his projects.

[ilonatommy]

This is a dupe of #44739 let's keep the discussion there.