Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

mcs/class/System.Private.CoreLib/System.Globalization/GlobalizationMode.cs

@@ -0,0 +1,20 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+using System.Runtime.CompilerServices;
+
+namespace System.Globalization
+{
+	internal static partial class GlobalizationMode
+	{
+		internal static bool Invariant { get; } = GetGlobalizationInvariantMode ();
+
+		static bool GetInvariantSwitchValue ()
+		{
+			var val = Environment.GetEnvironmentVariable ("DOTNET_SYSTEM_GLOBALIZATION_INVARIANT");
+			if (val != null)
+				return Boolean.IsTrueStringIgnoreCase (val) || val.Equals ("1");
+			return false;
+		}
+	}
+}