diff --git a/Dalamud/Interface/FontAwesome/FontAwesomeHelpers.cs b/Dalamud/Interface/FontAwesome/FontAwesomeHelpers.cs
index 14a7072b9..cf34d736e 100644
--- a/Dalamud/Interface/FontAwesome/FontAwesomeHelpers.cs
+++ b/Dalamud/Interface/FontAwesome/FontAwesomeHelpers.cs
@@ -73,9 +73,9 @@ public static class FontAwesomeHelpers
         {
             foreach (var icon in icons)
             {
-                var name = Enum.GetName(icon)?.ToLower();
+                var name = Enum.GetName(icon)?.ToLowerInvariant();
                 var searchTerms = icon.GetSearchTerms();
-                if (name!.Contains(search.ToLower()) || searchTerms.Contains(search.ToLower()))
+                if (name!.Contains(search.ToLowerInvariant()) || searchTerms.Contains(search.ToLowerInvariant()))
                 {
                     result.Add(icon);
                 }
@@ -102,10 +102,10 @@ public static class FontAwesomeHelpers
         // search by both terms and category
         foreach (var icon in icons)
         {
-            var name = Enum.GetName(icon)?.ToLower();
+            var name = Enum.GetName(icon)?.ToLowerInvariant();
             var searchTerms = icon.GetSearchTerms();
             var categories = icon.GetCategories();
-            if ((name!.Contains(search.ToLower()) || searchTerms.Contains(search.ToLower())) && categories.Contains(category))
+            if ((name!.Contains(search.ToLowerInvariant()) || searchTerms.Contains(search.ToLowerInvariant())) && categories.Contains(category))
             {
                 result.Add(icon);
             }
diff --git a/Dalamud/Interface/ImGuiFileDialog/FileDialog.Filters.cs b/Dalamud/Interface/ImGuiFileDialog/FileDialog.Filters.cs
index 919e65592..85b380bee 100644
--- a/Dalamud/Interface/ImGuiFileDialog/FileDialog.Filters.cs
+++ b/Dalamud/Interface/ImGuiFileDialog/FileDialog.Filters.cs
@@ -89,7 +89,7 @@ public partial class FileDialog
             foreach (var file in this.files)
             {
                 var show = true;
-                if (!string.IsNullOrEmpty(this.searchBuffer) && !file.FileName.ToLower().Contains(this.searchBuffer.ToLower()))
+                if (!string.IsNullOrEmpty(this.searchBuffer) && !file.FileName.ToLowerInvariant().Contains(this.searchBuffer.ToLowerInvariant()))
                 {
                     show = false;
                 }
diff --git a/Dalamud/Interface/ImGuiFileDialog/FileDialog.UI.cs b/Dalamud/Interface/ImGuiFileDialog/FileDialog.UI.cs
index 0dd1410d5..e4747b1e6 100644
--- a/Dalamud/Interface/ImGuiFileDialog/FileDialog.UI.cs
+++ b/Dalamud/Interface/ImGuiFileDialog/FileDialog.UI.cs
@@ -132,7 +132,7 @@ public partial class FileDialog
             AddToIconMap(new[] { "csv" }, FontAwesomeIcon.FileCsv, miscTextColor);
         }
 
-        return iconMap.TryGetValue(ext.ToLower(), out var icon) ? icon : new IconColorItem
+        return iconMap.TryGetValue(ext.ToLowerInvariant(), out var icon) ? icon : new IconColorItem
         {
             Icon = FontAwesomeIcon.File,
             Color = standardTextColor,
diff --git a/Dalamud/Interface/Internal/DalamudCommands.cs b/Dalamud/Interface/Internal/DalamudCommands.cs
index 86a316227..cc63d887f 100644
--- a/Dalamud/Interface/Internal/DalamudCommands.cs
+++ b/Dalamud/Interface/Internal/DalamudCommands.cs
@@ -350,10 +350,10 @@ internal class DalamudCommands : IServiceType
         var configuration = Service<DalamudConfiguration>.Get();
         var localization = Service<Localization>.Get();
 
-        if (Localization.ApplicableLangCodes.Contains(arguments.ToLower()) || arguments.ToLower() == "en")
+        if (Localization.ApplicableLangCodes.Contains(arguments.ToLowerInvariant()) || arguments.ToLowerInvariant() == "en")
         {
-            localization.SetupWithLangCode(arguments.ToLower());
-            configuration.LanguageOverride = arguments.ToLower();
+            localization.SetupWithLangCode(arguments.ToLowerInvariant());
+            configuration.LanguageOverride = arguments.ToLowerInvariant();
 
             chatGui.Print(string.Format(Loc.Localize("DalamudLanguageSetTo", "Language set to {0}"), arguments));
         }
diff --git a/Dalamud/Interface/Internal/UiDebug.cs b/Dalamud/Interface/Internal/UiDebug.cs
index 076ed0296..da5dc0d98 100644
--- a/Dalamud/Interface/Internal/UiDebug.cs
+++ b/Dalamud/Interface/Internal/UiDebug.cs
@@ -475,7 +475,7 @@ internal unsafe class UiDebug
                 var name = unitBase->NameString;
                 if (searching)
                 {
-                    if (name == null || !name.ToLower().Contains(searchStr.ToLower())) continue;
+                    if (name == null || !name.ToLowerInvariant().Contains(searchStr.ToLowerInvariant())) continue;
                 }
 
                 noResults = false;
diff --git a/Dalamud/Interface/Internal/Windows/Settings/SettingsWindow.cs b/Dalamud/Interface/Internal/Windows/Settings/SettingsWindow.cs
index 196a11ab1..5e3857f42 100644
--- a/Dalamud/Interface/Internal/Windows/Settings/SettingsWindow.cs
+++ b/Dalamud/Interface/Internal/Windows/Settings/SettingsWindow.cs
@@ -179,7 +179,7 @@ internal class SettingsWindow : Window
 
                     foreach (var settingsTab in this.tabs.Where(x => x.IsVisible))
                     {
-                        var eligible = settingsTab.Entries.Where(x => !x.Name.IsNullOrEmpty() && x.Name.ToLower().Contains(this.searchInput.ToLower())).ToArray();
+                        var eligible = settingsTab.Entries.Where(x => !x.Name.IsNullOrEmpty() && x.Name.ToLowerInvariant().Contains(this.searchInput.ToLowerInvariant())).ToArray();
 
                         if (!eligible.Any())
                             continue;
diff --git a/Dalamud/Localization.cs b/Dalamud/Localization.cs
index a50b6081f..3ed2ad519 100644
--- a/Dalamud/Localization.cs
+++ b/Dalamud/Localization.cs
@@ -138,7 +138,7 @@ public class Localization : IServiceType
     /// <param name="langCode">The language code to set up the UI language with.</param>
     public void SetupWithLangCode(string langCode)
     {
-        if (langCode.ToLower() == FallbackLangCode)
+        if (langCode.Equals(FallbackLangCode, StringComparison.InvariantCultureIgnoreCase))
         {
             this.SetupWithFallbacks();
             return;
diff --git a/Directory.Build.props b/Directory.Build.props
index 109deba65..0c5af2e37 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,10 +1,10 @@
 <!-- Code analysis settings for all Dalamud projects. -->
 <Project>
-    <!--
     <ItemGroup Label="Code Analysis">
         <PackageReference Include="Microsoft.CodeAnalysis.BannedApiAnalyzers" Version="3.3.4" PrivateAssets="All" />
         <AdditionalFiles Include="$(MSBuildThisFileDirectory)tools\BannedSymbols.txt" />
     </ItemGroup>
+    <!--
     <PropertyGroup Label="Code Analysis">
         <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)tools\dalamud.ruleset</CodeAnalysisRuleSet>
     </PropertyGroup>
diff --git a/tools/BannedSymbols.txt b/tools/BannedSymbols.txt
index 89cf843f4..3e5a36475 100644
--- a/tools/BannedSymbols.txt
+++ b/tools/BannedSymbols.txt
@@ -1,11 +1,11 @@
-M:System.Object.Equals(System.Object,System.Object)~System.Boolean;Don't use object.Equals. Use IEquatable<T> or EqualityComparer<T>.Default instead.
-M:System.Object.Equals(System.Object)~System.Boolean;Don't use object.Equals. Use IEquatable<T> or EqualityComparer<T>.Default instead.
-M:System.ValueType.Equals(System.Object)~System.Boolean;Don't use object.Equals(Fallbacks to ValueType). Use IEquatable<T> or EqualityComparer<T>.Default instead.
-M:System.Nullable`1.Equals(System.Object)~System.Boolean;Use == instead.
-T:System.IComparable;Don't use non-generic IComparable. Use generic version instead.
+#M:System.Object.Equals(System.Object,System.Object)~System.Boolean;Don't use object.Equals. Use IEquatable<T> or EqualityComparer<T>.Default instead.
+#M:System.Object.Equals(System.Object)~System.Boolean;Don't use object.Equals. Use IEquatable<T> or EqualityComparer<T>.Default instead.
+#M:System.ValueType.Equals(System.Object)~System.Boolean;Don't use object.Equals(Fallbacks to ValueType). Use IEquatable<T> or EqualityComparer<T>.Default instead.
+#M:System.Nullable`1.Equals(System.Object)~System.Boolean;Use == instead.
+#T:System.IComparable;Don't use non-generic IComparable. Use generic version instead.
 M:System.Guid.#ctor;Probably meaning to use Guid.NewGuid() instead. If actually wanting empty, use Guid.Empty.
-M:System.Threading.Tasks.Task.Wait();Don't use Task.Wait. Use Task.WaitSafely() to ensure we avoid deadlocks.
-P:System.Threading.Tasks.Task`1.Result;Don't use Task.Result. Use Task.GetResultSafely() to ensure we avoid deadlocks.
+#M:System.Threading.Tasks.Task.Wait();Don't use Task.Wait. Use Task.WaitSafely() to ensure we avoid deadlocks.
+#P:System.Threading.Tasks.Task`1.Result;Don't use Task.Result. Use Task.GetResultSafely() to ensure we avoid deadlocks.
 M:System.Threading.ManualResetEventSlim.Wait();Specify a timeout to avoid waiting forever.
 M:System.Char.ToLower(System.Char);char.ToLower() changes behaviour depending on CultureInfo.CurrentCulture. Use char.ToLowerInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture.
 M:System.Char.ToUpper(System.Char);char.ToUpper() changes behaviour depending on CultureInfo.CurrentCulture. Use char.ToUpperInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture.