Culture-specific sorting not applied when deployed

Question

I have a List of objects and need to sort the list based on one of the properties. This sorting should be done based on a specified culture. I found many resources explaining how this could be achieved and implemented them with success locally. However, when I deploy the code, sorting does not appear to be done based on the specified culture.

I have tried using both LINQ's OrderBy and List's Sort, both with the overload which accepts a StringComparer.

These are the snippets:

nor = norwegianStrings.OrderBy(x => x, StringComparer.Create(new System.Globalization.CultureInfo("no-NO", true), true)).ToArray();

danishStrings.Sort(StringComparer.Create(new System.Globalization.CultureInfo("da-DK"), true));

Both of these are working locally, and for reference I have tried both Array and List. When deployed though, it just sorts normally, like InvariantCulture. I have also tried to manually set Thread.CurrentThread.CurrentCulture and then using that in the StringComparer.

I have tried to add the cultures in Startup via

    services.Configure<RequestLocalizationOptions>(options =>
    {
        var supportedCultures = new[] { "no-NO", "sv-SE", "da-DK" };
        options.SetDefaultCulture(supportedCultures[0])
               .AddSupportedCultures(supportedCultures)
               .AddSupportedUICultures(supportedCultures);
    });

I am at a loss. Any idea why this could be happening? How can I solve this, or troubleshoot further?

Thanks in advance!

Answer 1

The issue was indeed regarding locales available in the machine.

App-local ICU was a no-go, or at least I was unable to get my container up and running with it. The dockerfile already included RUN apk add --no-cache icu-libs, but I did find that in some distros, icu-libs only included english locales.
So, I also had to include RUN apk add --no-cache icu-data-full.

Nothing required in Program.cs or Startup.cs. Nothing required in .csproj, just make sure to include the CORRECT icu in the machine.

Thanks for the help, guys!