diff --git a/osu.Game.Rulesets.Karaoke.Tests/Editor/Utils/HitObjectWritableUtilsTest.cs b/osu.Game.Rulesets.Karaoke.Tests/Editor/Utils/HitObjectWritableUtilsTest.cs
index 2f958111e..abaf83ef0 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Editor/Utils/HitObjectWritableUtilsTest.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Editor/Utils/HitObjectWritableUtilsTest.cs
@@ -9,7 +9,6 @@
 using osu.Game.Rulesets.Karaoke.Objects;
 using osu.Game.Rulesets.Karaoke.Objects.Properties;
 using osu.Game.Rulesets.Karaoke.Objects.Types;
-using osu.Game.Rulesets.Karaoke.Utils;
 
 namespace osu.Game.Rulesets.Karaoke.Tests.Editor.Utils
 {
@@ -24,7 +23,7 @@ public void TestIsRemoveLyricLocked()
             test(new Lyric());
 
             // test lock state.
-            foreach (var lockState in EnumUtils.GetValues<LockState>())
+            foreach (var lockState in Enum.GetValues<LockState>())
             {
                 test(new Lyric
                 {
@@ -61,7 +60,7 @@ public void TestIsWriteLyricPropertyLocked()
             test(new Lyric());
 
             // test lock state.
-            foreach (var lockState in EnumUtils.GetValues<LockState>())
+            foreach (var lockState in Enum.GetValues<LockState>())
             {
                 test(new Lyric
                 {
@@ -101,7 +100,7 @@ public void TestIsCreateOrRemoveNoteLocked()
             test(new Lyric());
 
             // test lock state.
-            foreach (var lockState in EnumUtils.GetValues<LockState>())
+            foreach (var lockState in Enum.GetValues<LockState>())
             {
                 test(new Lyric
                 {
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Graphics/TestSceneRightTriangle.cs b/osu.Game.Rulesets.Karaoke.Tests/Graphics/TestSceneRightTriangle.cs
index c733af726..b05f6d0d9 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Graphics/TestSceneRightTriangle.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Graphics/TestSceneRightTriangle.cs
@@ -1,6 +1,7 @@
 // Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -8,7 +9,6 @@
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Karaoke.Graphics.Shapes;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osu.Game.Tests.Visual;
 using osuTK;
 
@@ -45,7 +45,7 @@ private void load(OsuColour colours)
         [Test]
         public void TestRightAngleDirections()
         {
-            foreach (var direction in EnumUtils.GetValues<TriangleRightAngleDirection>())
+            foreach (var direction in Enum.GetValues<TriangleRightAngleDirection>())
             {
                 AddStep($"Test direction {direction}", () =>
                 {
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Overlays/TestSceneOverlayColourProvider.cs b/osu.Game.Rulesets.Karaoke.Tests/Overlays/TestSceneOverlayColourProvider.cs
index 056e357ed..9b24f282c 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Overlays/TestSceneOverlayColourProvider.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Overlays/TestSceneOverlayColourProvider.cs
@@ -16,7 +16,6 @@
 using osu.Game.Graphics.Sprites;
 using osu.Game.Overlays;
 using osu.Game.Rulesets.Karaoke.Extensions;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osu.Game.Tests.Visual;
 using osuTK.Graphics;
 
@@ -28,8 +27,8 @@ public partial class TestSceneOverlayColourProvider : OsuTestScene
         [Test]
         public void ShowWithNoFetch()
         {
-            var providers = EnumUtils.GetValues<OverlayColourScheme>()
-                                     .Select(x => new OverlayColourProvider(x));
+            var providers = Enum.GetValues<OverlayColourScheme>()
+                                .Select(x => new OverlayColourProvider(x));
             string[] colourName =
             {
                 "Colour1",
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/Lyrics/Components/TestSceneLyricEditorColourProvider.cs b/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/Lyrics/Components/TestSceneLyricEditorColourProvider.cs
index cc5a383c6..68816fc4d 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/Lyrics/Components/TestSceneLyricEditorColourProvider.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/Lyrics/Components/TestSceneLyricEditorColourProvider.cs
@@ -16,7 +16,6 @@
 using osu.Game.Graphics.Sprites;
 using osu.Game.Rulesets.Karaoke.Extensions;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osu.Game.Tests.Visual;
 using osuTK.Graphics;
 
@@ -28,7 +27,7 @@ public partial class TestSceneLyricEditorColourProvider : OsuTestScene
         public void ShowWithNoFetch()
         {
             var provider = new LyricEditorColourProvider();
-            var types = EnumUtils.GetValues<LyricEditorMode>();
+            var types = Enum.GetValues<LyricEditorMode>();
 
             string[] colourName =
             {
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/TestSceneLyricEditorScreen.cs b/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/TestSceneLyricEditorScreen.cs
index eb038e724..aa48a6c63 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/TestSceneLyricEditorScreen.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Beatmap/TestSceneLyricEditorScreen.cs
@@ -15,7 +15,6 @@
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Settings;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.States.Modes;
-using osu.Game.Rulesets.Karaoke.Utils;
 
 namespace osu.Game.Rulesets.Karaoke.Tests.Screens.Edit.Beatmap
 {
@@ -109,22 +108,22 @@ public void TestSingerMode()
 
         private void switchToMode(LyricEditorMode mode)
         {
-            AddStep($"switch to mode {Enum.GetName(typeof(LyricEditorMode), mode)}", () =>
+            AddStep($"switch to mode {Enum.GetName(mode)}", () =>
             {
                 bindableLyricEditorMode.Value = mode;
             });
             AddWaitStep("wait for switch to new mode", 5);
         }
 
-        private void clickEditModeButtons<T>() where T : Enum
+        private void clickEditModeButtons<T>() where T : struct, Enum
         {
-            foreach (var editMode in EnumUtils.GetValues<T>())
+            foreach (var editMode in Enum.GetValues<T>())
             {
                 clickTargetEditModeButton(editMode);
             }
         }
 
-        private void clickTargetEditModeButton<T>(T editMode) where T : Enum
+        private void clickTargetEditModeButton<T>(T editMode) where T : struct, Enum
         {
             AddStep("Click the button", () =>
             {
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Import/TestSceneLyricImporter.cs b/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Import/TestSceneLyricImporter.cs
index 52cf09aed..3781917dd 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Import/TestSceneLyricImporter.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Screens/Edit/Import/TestSceneLyricImporter.cs
@@ -14,7 +14,6 @@
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Import.Lyrics;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Import.Lyrics.DragFile;
 using osu.Game.Rulesets.Karaoke.Tests.Resources;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osu.Game.Screens.Edit;
 
 namespace osu.Game.Rulesets.Karaoke.Tests.Screens.Edit.Import
@@ -59,11 +58,11 @@ private void load()
         [Test]
         public void TestGoToStep()
         {
-            var steps = EnumUtils.GetValues<LyricImporterStep>();
+            var steps = Enum.GetValues<LyricImporterStep>();
 
             foreach (var step in steps)
             {
-                AddStep($"go to step {Enum.GetName(typeof(LyricImporterStep), step)}", () => { Screen.GoToStep(step); });
+                AddStep($"go to step {Enum.GetName(step)}", () => { Screen.GoToStep(step); });
             }
         }
 
@@ -88,7 +87,7 @@ public void GoToStep(LyricImporterStep step)
                 if (step <= lyricSubScreen.Step)
                     return;
 
-                var totalSteps = EnumUtils.GetValues<LyricImporterStep>().Where(x => x > lyricSubScreen.Step && x <= step);
+                var totalSteps = Enum.GetValues<LyricImporterStep>().Where(x => x > lyricSubScreen.Step && x <= step);
 
                 foreach (var gotoStep in totalSteps)
                 {
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Skinning/TestSceneDrawableJudgement.cs b/osu.Game.Rulesets.Karaoke.Tests/Skinning/TestSceneDrawableJudgement.cs
index 13f9976f4..00e2023b4 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Skinning/TestSceneDrawableJudgement.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Skinning/TestSceneDrawableJudgement.cs
@@ -1,12 +1,12 @@
 // Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using System.Linq;
 using osu.Framework.Extensions;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Karaoke.UI;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Scoring;
 
@@ -16,7 +16,7 @@ public partial class TestSceneDrawableJudgement : KaraokeSkinnableTestScene
     {
         public TestSceneDrawableJudgement()
         {
-            foreach (var result in EnumUtils.GetValues<HitResult>().Skip(1))
+            foreach (var result in Enum.GetValues<HitResult>().Skip(1))
             {
                 AddStep("Show " + result.GetDescription(), () => SetContents(_ =>
                     new DrawableNoteJudgement(new JudgementResult(new HitObject(), new Judgement()) { Type = result }, null)
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Utils/EnumUtilsTest.cs b/osu.Game.Rulesets.Karaoke.Tests/Utils/EnumUtilsTest.cs
index fe5578d77..8d201806e 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Utils/EnumUtilsTest.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Utils/EnumUtilsTest.cs
@@ -10,19 +10,6 @@ namespace osu.Game.Rulesets.Karaoke.Tests.Utils
     [TestFixture]
     public class EnumUtilsTest
     {
-        [Test]
-        public void TestGetValues()
-        {
-            var expected = new[]
-            {
-                TestEnum.Enum1,
-                TestEnum.Enum2,
-                TestEnum.Enum3
-            };
-            var actual = EnumUtils.GetValues<TestEnum>();
-            Assert.AreEqual(expected, actual);
-        }
-
         [TestCase(TestEnum.Enum1, TestEnum.Enum3)]
         [TestCase(TestEnum.Enum2, TestEnum.Enum1)]
         [TestCase(TestEnum.Enum3, TestEnum.Enum2)]
diff --git a/osu.Game.Rulesets.Karaoke/Edit/Components/ContextMenu/LyricLockContextMenu.cs b/osu.Game.Rulesets.Karaoke/Edit/Components/ContextMenu/LyricLockContextMenu.cs
index 367de038b..000ad89db 100644
--- a/osu.Game.Rulesets.Karaoke/Edit/Components/ContextMenu/LyricLockContextMenu.cs
+++ b/osu.Game.Rulesets.Karaoke/Edit/Components/ContextMenu/LyricLockContextMenu.cs
@@ -1,15 +1,13 @@
 // Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Rulesets.Karaoke.Edit.ChangeHandlers;
 using osu.Game.Rulesets.Karaoke.Objects;
 using osu.Game.Rulesets.Karaoke.Objects.Types;
-using osu.Game.Rulesets.Karaoke.Utils;
 
 namespace osu.Game.Rulesets.Karaoke.Edit.Components.ContextMenu
 {
@@ -23,7 +21,7 @@ public LyricLockContextMenu(ILockChangeHandler lockChangeHandler, Lyric lyric, s
         public LyricLockContextMenu(ILockChangeHandler lockChangeHandler, List<Lyric> lyrics, string name)
             : base(name)
         {
-            Items = EnumUtils.GetValues<LockState>().Select(l => new OsuMenuItem(l.ToString(), anyLyricInLockState(l) ? MenuItemType.Highlighted : MenuItemType.Standard, () =>
+            Items = Enum.GetValues<LockState>().Select(l => new OsuMenuItem(l.ToString(), anyLyricInLockState(l) ? MenuItemType.Highlighted : MenuItemType.Standard, () =>
             {
                 // todo: how to make lyric as selected?
                 lockChangeHandler.Lock(l);
diff --git a/osu.Game.Rulesets.Karaoke/Edit/Components/Menus/EnumMenu.cs b/osu.Game.Rulesets.Karaoke/Edit/Components/Menus/EnumMenu.cs
index fcab4fc6c..7b8114915 100644
--- a/osu.Game.Rulesets.Karaoke/Edit/Components/Menus/EnumMenu.cs
+++ b/osu.Game.Rulesets.Karaoke/Edit/Components/Menus/EnumMenu.cs
@@ -1,8 +1,6 @@
 // Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -11,7 +9,6 @@
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics.UserInterface;
 using osu.Game.Graphics.UserInterface;
-using osu.Game.Rulesets.Karaoke.Utils;
 
 namespace osu.Game.Rulesets.Karaoke.Edit.Components.Menus
 {
@@ -46,7 +43,7 @@ private ToggleMenuItem[] createMenuItems()
             }).ToArray();
         }
 
-        protected virtual IEnumerable<T> ValidEnums => EnumUtils.GetValues<T>();
+        protected virtual IEnumerable<T> ValidEnums => Enum.GetValues<T>();
 
         protected string GetName(T selection)
             => selection.GetDescription();
diff --git a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Compose/LyricComposer.cs b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Compose/LyricComposer.cs
index 292f6445e..20a910324 100644
--- a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Compose/LyricComposer.cs
+++ b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Compose/LyricComposer.cs
@@ -18,7 +18,6 @@
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Compose.BottomEditor;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Compose.Panels;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.States.Modes;
-using osu.Game.Rulesets.Karaoke.Utils;
 
 namespace osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Compose
 {
@@ -175,7 +174,7 @@ protected override bool OnInvalidate(Invalidation invalidation, InvalidationSour
 
         private void initializePanel()
         {
-            foreach (var panelType in EnumUtils.GetValues<PanelType>())
+            foreach (var panelType in Enum.GetValues<PanelType>())
             {
                 var instance = getInstance(panelType);
 
diff --git a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/LyricEditorEditModeSection.cs b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/LyricEditorEditModeSection.cs
index aca804e8a..16776f197 100644
--- a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/LyricEditorEditModeSection.cs
+++ b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/LyricEditorEditModeSection.cs
@@ -5,7 +5,6 @@
 
 using System;
 using osu.Framework.Allocation;
-using osu.Framework.Localisation;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Settings.Components.Markdown;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.States;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.States.Modes;
@@ -14,7 +13,7 @@
 namespace osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Settings
 {
     public abstract partial class LyricEditorEditModeSection<TEditModeState, TEditMode> : LyricEditorEditModeSection<TEditMode>
-        where TEditModeState : IHasEditModeState<TEditMode> where TEditMode : Enum
+        where TEditModeState : IHasEditModeState<TEditMode> where TEditMode : struct, Enum
     {
         [Resolved]
         private TEditModeState tEditModeState { get; set; }
@@ -30,7 +29,7 @@ internal sealed override void UpdateEditMode(TEditMode mode)
     }
 
     public abstract partial class LyricEditorEditModeSection<TEditMode> : EditModeSection<TEditMode>
-        where TEditMode : Enum
+        where TEditMode : struct, Enum
     {
         [Resolved]
         private ILyricSelectionState lyricSelectionState { get; set; }
diff --git a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/RubyRomaji/TextTagEditModeSection.cs b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/RubyRomaji/TextTagEditModeSection.cs
index fe8bd894a..251c40f81 100644
--- a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/RubyRomaji/TextTagEditModeSection.cs
+++ b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/RubyRomaji/TextTagEditModeSection.cs
@@ -9,7 +9,7 @@ namespace osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Settings.RubyRo
 {
     public abstract partial class TextTagEditModeSection<TEditModeState, TEditMode> : LyricEditorEditModeSection<TEditModeState, TEditMode>
         where TEditModeState : IHasEditModeState<TEditMode>
-        where TEditMode : Enum
+        where TEditMode : struct, Enum
     {
         protected override OverlayColourScheme CreateColourScheme()
             => OverlayColourScheme.Pink;
diff --git a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/TimeTags/TimeTagCreateConfigSubsection.cs b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/TimeTags/TimeTagCreateConfigSubsection.cs
index 8e012b25d..53a1f6967 100644
--- a/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/TimeTags/TimeTagCreateConfigSubsection.cs
+++ b/osu.Game.Rulesets.Karaoke/Screens/Edit/Beatmaps/Lyrics/Settings/TimeTags/TimeTagCreateConfigSubsection.cs
@@ -17,7 +17,6 @@
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.Settings.Components.Markdown;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Beatmaps.Lyrics.States;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Components.Markdown;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osuTK;
 using osuTK.Graphics;
 
@@ -75,7 +74,7 @@ public TimeTagCreateConfigSubsection()
                             },
                             Content = new[]
                             {
-                                buttons = EnumUtils.GetValues<CreateTimeTagEditMode>().Select(x => new EditModeButton(x)
+                                buttons = Enum.GetValues<CreateTimeTagEditMode>().Select(x => new EditModeButton(x)
                                 {
                                     Text = getButtonTitle(x),
                                     Margin = new MarginPadding { Vertical = button_vertical_margin },
diff --git a/osu.Game.Rulesets.Karaoke/Screens/Edit/EditModeSection.cs b/osu.Game.Rulesets.Karaoke/Screens/Edit/EditModeSection.cs
index 757e65a99..397238203 100644
--- a/osu.Game.Rulesets.Karaoke/Screens/Edit/EditModeSection.cs
+++ b/osu.Game.Rulesets.Karaoke/Screens/Edit/EditModeSection.cs
@@ -18,12 +18,11 @@
 using osu.Game.Overlays.Toolbar;
 using osu.Game.Rulesets.Edit.Checks.Components;
 using osu.Game.Rulesets.Karaoke.Screens.Edit.Components.Markdown;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Karaoke.Screens.Edit;
 
-public abstract partial class EditModeSection<TEditMode> : EditorSection where TEditMode : Enum
+public abstract partial class EditModeSection<TEditMode> : EditorSection where TEditMode : struct, Enum
 {
     private const int horizontal_padding = 20;
 
@@ -73,7 +72,7 @@ protected EditModeSection()
     }
 
     private Selection[] createSelections()
-        => EnumUtils.GetValues<TEditMode>().Select(mode =>
+        => Enum.GetValues<TEditMode>().Select(mode =>
         {
             var selection = CreateSelection(mode);
             selection.Mode = mode;
diff --git a/osu.Game.Rulesets.Karaoke/Screens/Edit/IssueSection.cs b/osu.Game.Rulesets.Karaoke/Screens/Edit/IssueSection.cs
index 1705ddd31..fdf1cb57e 100644
--- a/osu.Game.Rulesets.Karaoke/Screens/Edit/IssueSection.cs
+++ b/osu.Game.Rulesets.Karaoke/Screens/Edit/IssueSection.cs
@@ -20,7 +20,6 @@
 using osu.Game.Overlays;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Checks.Components;
-using osu.Game.Rulesets.Karaoke.Utils;
 using osuTK;
 
 namespace osu.Game.Rulesets.Karaoke.Screens.Edit;
@@ -217,7 +216,7 @@ protected IssueNavigator()
         }
 
         private IssueCategory[] createCategory()
-            => EnumUtils.GetValues<IssueType>().Select(type => new IssueCategory
+            => Enum.GetValues<IssueType>().Select(type => new IssueCategory
             {
                 Type = type,
                 Text = getTextByIssueType(type),
diff --git a/osu.Game.Rulesets.Karaoke/Skinning/KaraokeBeatmapSkin.cs b/osu.Game.Rulesets.Karaoke/Skinning/KaraokeBeatmapSkin.cs
index a04a048b9..daa898ae3 100644
--- a/osu.Game.Rulesets.Karaoke/Skinning/KaraokeBeatmapSkin.cs
+++ b/osu.Game.Rulesets.Karaoke/Skinning/KaraokeBeatmapSkin.cs
@@ -37,7 +37,7 @@ public KaraokeBeatmapSkin(SkinInfo skin, IStorageResourceProvider? resources, IR
                 var globalSetting = SkinJsonSerializableExtensions.CreateSkinElementGlobalSettings();
 
                 // we may want to move this to some kind of async operation in the future.
-                foreach (ElementType skinnableTarget in Enum.GetValues(typeof(ElementType)))
+                foreach (ElementType skinnableTarget in Enum.GetValues<ElementType>())
                 {
                     string filename = $"{getFileNameByType(skinnableTarget)}.json";
 
diff --git a/osu.Game.Rulesets.Karaoke/Utils/EnumUtils.cs b/osu.Game.Rulesets.Karaoke/Utils/EnumUtils.cs
index 88cb50959..374ef1b1f 100644
--- a/osu.Game.Rulesets.Karaoke/Utils/EnumUtils.cs
+++ b/osu.Game.Rulesets.Karaoke/Utils/EnumUtils.cs
@@ -9,14 +9,11 @@ namespace osu.Game.Rulesets.Karaoke.Utils
 {
     public static class EnumUtils
     {
-        public static T[] GetValues<T>() where T : Enum
-            => (T[])Enum.GetValues(typeof(T));
+        public static T GetPreviousValue<T>(T v) where T : struct, Enum
+            => Enum.GetValues<T>().Concat(new[] { default(T)! }).Reverse().SkipWhile(e => !EqualityComparer<T>.Default.Equals(v, e)).Skip(1).First();
 
-        public static T GetPreviousValue<T>(T v) where T : Enum
-            => GetValues<T>().Concat(new[] { default(T)! }).Reverse().SkipWhile(e => !EqualityComparer<T>.Default.Equals(v, e)).Skip(1).First();
-
-        public static T GetNextValue<T>(T v) where T : Enum
-            => GetValues<T>().Concat(new[] { default(T)! }).SkipWhile(e => !EqualityComparer<T>.Default.Equals(v, e)).Skip(1).First();
+        public static T GetNextValue<T>(T v) where T : struct, Enum
+            => Enum.GetValues<T>().Concat(new[] { default(T)! }).SkipWhile(e => !EqualityComparer<T>.Default.Equals(v, e)).Skip(1).First();
 
         public static T Casting<T>(Enum mode)
             => (T)(object)mode;