[API Proposal]: Expose `GlobalizationMode.Invariant` (and potentially others) publicly

[gurustron]

Background and motivation

Expose members of GlobalizationMode publicly. There is request for that:

• @ Stackoverflow
• @ Microsoft.Data.SqlClient (which actually causes a bug - Detecting globalization-invariant mode fails SqlClient#1913)

API Proposal

namespace System.Globalization
{
    public static partial class GlobalizationMode
    {
        public static bool IsInvariant => ...;
    }
}

API Usage

var isGlobalizationInvarinat = GlobalizationMode.IsInvariant;

Alternative Designs

No response

Risks

No response

Tagging subscribers to this area: @dotnet/area-system-globalization
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Issue Details

---

Background and motivation

Expose members of GlobalizationMode publicly. There is request for that:

• @ Stackoverflow
• @ Microsoft.Data.SqlClient

API Proposal

namespace System.Globalization
{
    public static partial class GlobalizationMode
    {
        public static bool IsInvariant => ...;
    }
}

API Usage

var isGlobalizationInvarinat = GlobalizationMode.IsInvariant;

Alternative Designs

No response

Risks

No response

Author:	gurustron
Assignees:	-
Labels:	api-suggestion, area-System.Globalization
Milestone:	-

[tarekgh]

Why is reading the settings not good enough for that? I don't think this is going to change at all in the future.

       // https://source.dot.net/#System.Private.CoreLib/src/libraries/System.Private.CoreLib/src/System/Globalization/GlobalizationMode.cs,15
       // https://source.dot.net/#System.Private.CoreLib/src/libraries/System.Private.CoreLib/src/System/AppContextConfigHelper.cs,13

        public static bool IsInvariantMode()
        {
            if (!AppContext.TryGetSwitch("System.Globalization.Invariant", out bool ret))
            {
                string? switchValue = Environment.GetEnvironmentVariable("DOTNET_SYSTEM_GLOBALIZATION_INVARIANT");
                ret = switchValue != null ? switchValue.Equals("True", StringComparison.OrdinalIgnoreCase) || switchValue.Equals("1")) : false;
            }

            return ret;
        }

This issue has been marked needs-author-action and may be missing some important information.

[gurustron]

@tarekgh because it requires some understanding of internal workings of the feature and leads to some inventive code even in Microsoft products as you see in the linked Microsoft.Data.SqlClient sources. And it is small but still bunch of code instead of one small concise static property access.