From da1df3703fa1ec22c1323f959909f039a5d2f646 Mon Sep 17 00:00:00 2001
From: Sukru Alatas <alatas@gmail.com>
Date: Wed, 7 Nov 2018 00:03:35 +0300
Subject: [PATCH] tr-TR culture problem fix #1095

---
 Engine/Settings.cs                            |  2 +-
 .../Issue1095/Issue1095.tests.ps1             | 20 +++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 Tests/Engine/SettingsTest/Issue1095/Issue1095.tests.ps1

diff --git a/Engine/Settings.cs b/Engine/Settings.cs
index 4f9dcd546..7b98b54b8 100644
--- a/Engine/Settings.cs
+++ b/Engine/Settings.cs
@@ -395,7 +395,7 @@ private void parseSettingsHashtable(Hashtable settingsHashtable)
             var settings = GetDictionaryFromHashtable(settingsHashtable);
             foreach (var settingKey in settings.Keys)
             {
-                var key = settingKey.ToLower();
+                var key = settingKey.ToLowerInvariant();
                 object val = settings[key];
                 switch (key)
                 {
diff --git a/Tests/Engine/SettingsTest/Issue1095/Issue1095.tests.ps1 b/Tests/Engine/SettingsTest/Issue1095/Issue1095.tests.ps1
new file mode 100644
index 000000000..d768a7c85
--- /dev/null
+++ b/Tests/Engine/SettingsTest/Issue1095/Issue1095.tests.ps1
@@ -0,0 +1,20 @@
+Describe "Issue 1095: An exception is thrown when CurrentCulture is Turkish (tr-TR)" {
+    It "Should not throw an exception when CurrentCulture is tr-TR" {
+        # https://github.com/PowerShell/PSScriptAnalyzer/issues/1095
+
+		$initialCulture = Get-Culture
+        $initialUICulture = Get-UICulture
+
+        {
+            $trTRculture = [System.Globalization.CultureInfo]::GetCultureInfo('tr-TR')
+            [System.Threading.Thread]::CurrentThread.CurrentUICulture = $trTRculture
+            [System.Threading.Thread]::CurrentThread.CurrentCulture = $trTRculture
+            Invoke-Formatter "`$test" -ErrorAction Stop
+
+        } | Should -Throw -Not
+
+        [System.Threading.Thread]::CurrentThread.CurrentCulture = $initialCulture
+        [System.Threading.Thread]::CurrentThread.CurrentUICulture = $initialUICulture
+       
+    }
+}
\ No newline at end of file