NativeName on CurrentCulture is shorten on Blazor WebAssembly .NET 5.0

[christianzingg]

The following Code produces different output comparing Blazor WebAssembly 3.2.0 and 5.0.0:

Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
var native = Thread.CurrentThread.CurrentCulture.NativeName;
Console.WriteLine(native);

Blazor WebAssembly 5.0.0 --> "en (US)"
Blazor WebAssembly 3.2.0 --> "English (United States)"

PS: On normal ASP-Web application running with .NET 5.0 the output is "English (United States)"

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Issue Details

Description:	The following Code produces different output comparing Blazor WebAssembly 3.2.0 and 5.0.0: Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US"); var native = Thread.CurrentThread.CurrentCulture.NativeName; Console.WriteLine(native); Blazor WebAssembly 5.0.0 --> "en (US)" Blazor WebAssembly 3.2.0 --> "English (United States)" PS: On normal ASP-Web application running with .NET 5.0 the output is "English (United States)"
Author:	christianzingg
Assignees:	-
Labels:	area-System.Globalization, untriaged
Milestone:	-

[safern]

cc: @lewing @EgorBo

[csharpfritz]

This is a regression in .NET 5 compared to all of the other .NET frameworks. Please reconsider a patch to address this for our developers and users that don't speak English

Also: EnglishName property is misconfigured similarly

[tarekgh]

CC @tqiu8