Seal/abstract/virtual everything (#6739)

Content.Benchmarks/ColorInterpolateBenchmark.cs

@@ -12,7 +12,7 @@ using SysVector4 = System.Numerics.Vector4;
 namespace Content.Benchmarks
 {
     [DisassemblyDiagnoser]
-    public class ColorInterpolateBenchmark
+    public sealed class ColorInterpolateBenchmark
     {
 #if NETCOREAPP
         private const MethodImplOptions AggressiveOpt = MethodImplOptions.AggressiveOptimization;

Content.Benchmarks/ComponentFetchBenchmark.cs

@@ -6,7 +6,7 @@ using Robust.Shared.Utility;
 namespace Content.Benchmarks
 {
     [SimpleJob]
-    public class ComponentFetchBenchmark
+    public sealed class ComponentFetchBenchmark
     {
         [Params(5000)] public int NEnt { get; set; }
 
@@ -218,39 +218,39 @@ namespace Content.Benchmarks
             public EntityUid Uid;
         }
 
-        private class BComponent1 : BComponent
+        private sealed class BComponent1 : BComponent
         {
         }
 
-        private class BComponent2 : BComponent
+        private sealed class BComponent2 : BComponent
         {
         }
 
-        private class BComponent3 : BComponent
+        private sealed class BComponent3 : BComponent
         {
         }
 
-        private class BComponent4 : BComponent
+        private sealed class BComponent4 : BComponent
         {
         }
 
-        private class BComponentLookup : BComponent
+        private sealed class BComponentLookup : BComponent
         {
         }
 
-        private class BComponent6 : BComponent
+        private sealed class BComponent6 : BComponent
         {
         }
 
-        private class BComponent7 : BComponent
+        private sealed class BComponent7 : BComponent
         {
         }
 
-        private class BComponent8 : BComponent
+        private sealed class BComponent8 : BComponent
         {
         }
 
-        private class BComponent9 : BComponent
+        private sealed class BComponent9 : BComponent
         {
         }
     }

Content.Benchmarks/DependencyInjectBenchmark.cs

@@ -6,7 +6,7 @@ namespace Content.Benchmarks
 {
     // To actually run this benchmark you'll have to make DependencyCollection public so it's accessible.
 
-    public class DependencyInjectBenchmark
+    public sealed class DependencyInjectBenchmark
     {
         [Params(InjectMode.Reflection, InjectMode.DynamicMethod)]
         public InjectMode Mode { get; set; }

Content.Benchmarks/DynamicTreeBenchmark.cs

@@ -5,7 +5,7 @@ using Robust.Shared.Physics;
 namespace Content.Benchmarks
 {
     [SimpleJob, MemoryDiagnoser]
-    public class DynamicTreeBenchmark
+    public sealed class DynamicTreeBenchmark
     {
         private static readonly Box2[] _aabbs1 =
         {

Content.Benchmarks/EntityFetchBenchmark.cs

@@ -6,7 +6,7 @@ using Robust.Shared.Utility;
 namespace Content.Benchmarks
 {
     [SimpleJob]
-    public class EntityFetchBenchmark
+    public sealed class EntityFetchBenchmark
     {
         [Params(1000)] public int N { get; set; }
 

Content.Benchmarks/EntityManagerGetAllComponents.cs

@@ -10,7 +10,7 @@ using Robust.Shared.Reflection;
 
 namespace Content.Benchmarks
 {
-    public class EntityManagerGetAllComponents
+    public sealed class EntityManagerGetAllComponents
     {
         private IEntityManager _entityManager;
 
@@ -87,7 +87,7 @@ namespace Content.Benchmarks
             return count;
         }
 
-        private class DummyComponent : Component
+        private sealed class DummyComponent : Component
         {
         }
     }

Content.Benchmarks/NetSerializerIntBenchmark.cs

@@ -6,7 +6,7 @@ using BenchmarkDotNet.Attributes;
 namespace Content.Benchmarks
 {
     [SimpleJob]
-    public class NetSerializerIntBenchmark
+    public sealed class NetSerializerIntBenchmark
     {
         private MemoryStream _writeStream;
         private MemoryStream _readStream;

Content.Benchmarks/NetSerializerStringBenchmark.cs

@@ -13,7 +13,7 @@ namespace Content.Benchmarks
     // Code for the *Slow and *Unsafe implementations taken from NetSerializer, licensed under the MIT license.
 
     [MemoryDiagnoser]
-    public class NetSerializerStringBenchmark
+    public sealed class NetSerializerStringBenchmark
     {
         private const int StringByteBufferLength = 256;
         private const int StringCharBufferLength = 128;

Content.Benchmarks/StereoToMonoBenchmark.cs

@@ -3,7 +3,7 @@ using BenchmarkDotNet.Attributes;
 
 namespace Content.Benchmarks
 {
-    public class StereoToMonoBenchmark
+    public sealed class StereoToMonoBenchmark
     {
         [Params(128, 256, 512)]
         public int N { get; set; }

Content.Client/AI/ClientAiDebugSystem.cs

@@ -13,7 +13,7 @@ using static Robust.Client.UserInterface.Controls.BoxContainer;
 namespace Content.Client.AI
 {
 #if DEBUG
-    public class ClientAiDebugSystem : EntitySystem
+    public sealed class ClientAiDebugSystem : EntitySystem
     {
         [Dependency] private readonly IEyeManager _eyeManager = default!;
 

Content.Client/AI/ClientPathfindingDebugSystem.cs

@@ -16,7 +16,7 @@ using Robust.Shared.Timing;
 namespace Content.Client.AI
 {
 #if DEBUG
-    public class ClientPathfindingDebugSystem : EntitySystem
+    public sealed class ClientPathfindingDebugSystem : EntitySystem
     {
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;

Content.Client/AME/UI/AMEControllerBoundUserInterface.cs

@@ -7,7 +7,7 @@ using static Content.Shared.AME.SharedAMEControllerComponent;
 namespace Content.Client.AME.UI
 {
     [UsedImplicitly]
-    public class AMEControllerBoundUserInterface : BoundUserInterface
+    public sealed class AMEControllerBoundUserInterface : BoundUserInterface
     {
         private AMEWindow? _window;
 

Content.Client/AME/UI/AMEWindow.xaml.cs

@@ -12,7 +12,7 @@ using static Content.Shared.AME.SharedAMEControllerComponent;
 namespace Content.Client.AME.UI
 {
     [GenerateTypedNameReferences]
-    public partial class AMEWindow : DefaultWindow
+    public sealed partial class AMEWindow : DefaultWindow
     {
         public AMEWindow(AMEControllerBoundUserInterface ui)
         {

Content.Client/AME/Visualizers/AMEControllerVisualizer.cs

@@ -7,7 +7,7 @@ using static Content.Shared.AME.SharedAMEControllerComponent;
 namespace Content.Client.AME.Visualizers
 {
     [UsedImplicitly]
-    public class AMEControllerVisualizer : AppearanceVisualizer
+    public sealed class AMEControllerVisualizer : AppearanceVisualizer
     {
         public override void InitializeEntity(EntityUid entity)
         {

Content.Client/AME/Visualizers/AMEVisualizer.cs

@@ -7,7 +7,7 @@ using static Content.Shared.AME.SharedAMEShieldComponent;
 namespace Content.Client.AME.Visualizers
 {
     [UsedImplicitly]
-    public class AMEVisualizer : AppearanceVisualizer
+    public sealed class AMEVisualizer : AppearanceVisualizer
     {
         public override void InitializeEntity(EntityUid entity)
         {

Content.Client/Access/UI/IdCardConsoleBoundUserInterface.cs

@@ -7,7 +7,7 @@ using static Content.Shared.Access.Components.SharedIdCardConsoleComponent;
 
 namespace Content.Client.Access.UI
 {
-    public class IdCardConsoleBoundUserInterface : BoundUserInterface
+    public sealed class IdCardConsoleBoundUserInterface : BoundUserInterface
     {
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
         [Dependency] private readonly IEntityManager _entityManager = default!;

Content.Client/Access/UI/IdCardConsoleWindow.xaml.cs

@@ -13,7 +13,7 @@ using static Content.Shared.Access.Components.SharedIdCardConsoleComponent;
 namespace Content.Client.Access.UI
 {
     [GenerateTypedNameReferences]
-    public partial class IdCardConsoleWindow : DefaultWindow
+    public sealed partial class IdCardConsoleWindow : DefaultWindow
     {
         private readonly IdCardConsoleBoundUserInterface _owner;
 

Content.Client/Actions/ActionsSystem.cs

@@ -12,7 +12,7 @@ using Robust.Shared.IoC;
 namespace Content.Client.Actions
 {
     [UsedImplicitly]
-    public class ActionsSystem : EntitySystem
+    public sealed class ActionsSystem : EntitySystem
     {
         [Dependency] private readonly IPlayerManager _playerManager = default!;
 

Content.Client/Actions/Assignments/ActionAssignments.cs

@@ -9,7 +9,7 @@ namespace Content.Client.Actions.Assignments
     /// <summary>
     /// Tracks and manages the hotbar assignments for actions.
     /// </summary>
-    public class ActionAssignments
+    public sealed class ActionAssignments
     {
         // the slots and assignments fields hold client's assignments (what action goes in what slot),
         // which are completely client side and independent of what actions they've actually been granted and

Content.Client/Actions/UI/ActionAlertTooltip.cs

@@ -11,7 +11,7 @@ namespace Content.Client.Actions.UI
     /// <summary>
     /// Tooltip for actions or alerts because they are very similar.
     /// </summary>
-    public class ActionAlertTooltip : PanelContainer
+    public sealed class ActionAlertTooltip : PanelContainer
     {
         private const float TooltipTextMaxWidth = 350;
 

Content.Client/Actions/UI/ActionMenu.cs

@@ -27,7 +27,7 @@ namespace Content.Client.Actions.UI
     /// Action selection menu, allows filtering and searching over all possible
     /// actions and populating those actions into the hotbar.
     /// </summary>
-    public class ActionMenu : DefaultWindow
+    public sealed class ActionMenu : DefaultWindow
     {
         private const string ItemTag = "item";
         private const string NotItemTag = "not item";

Content.Client/Actions/UI/ActionMenuItem.cs

@@ -10,7 +10,7 @@ namespace Content.Client.Actions.UI
     /// <summary>
     /// An individual action visible in the action menu.
     /// </summary>
-    public class ActionMenuItem : ContainerButton
+    public sealed class ActionMenuItem : ContainerButton
     {
         // shorter than default tooltip delay so user can
         // quickly explore what each action is

Content.Client/Actions/UI/ActionSlot.cs

@@ -25,7 +25,7 @@ namespace Content.Client.Actions.UI
     /// A slot in the action hotbar. Not extending BaseButton because
     /// its needs diverged too much.
     /// </summary>
-    public class ActionSlot : PanelContainer
+    public sealed class ActionSlot : PanelContainer
     {
         // shorter than default tooltip delay so user can more easily
         // see what actions they've been given

Content.Client/Administration/AdminNameOverlay.cs

@@ -7,7 +7,7 @@ using Robust.Shared.Maths;
 
 namespace Content.Client.Administration
 {
-    internal class AdminNameOverlay : Overlay
+    internal sealed class AdminNameOverlay : Overlay
     {
         private readonly AdminSystem _system;
         private readonly IEntityManager _entityManager;

Content.Client/Administration/AdminSystem.Menu.cs

@@ -19,7 +19,7 @@ using Robust.Shared.Network;
 
 namespace Content.Client.Administration
 {
-    public partial class AdminSystem
+    public sealed partial class AdminSystem
     {
         [Dependency] private readonly INetManager _netManager = default!;
         [Dependency] private readonly IInputManager _inputManager = default!;

Content.Client/Administration/AdminSystem.Overlay.cs

@@ -5,7 +5,7 @@ using Robust.Shared.IoC;
 
 namespace Content.Client.Administration
 {
-    public partial class AdminSystem
+    public sealed partial class AdminSystem
     {
         [Dependency] private readonly IClientAdminManager _adminManager = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;

Content.Client/Administration/AdminSystem.cs

@@ -9,7 +9,7 @@ using Robust.Shared.Network;
 
 namespace Content.Client.Administration
 {
-    public partial class AdminSystem : EntitySystem
+    public sealed partial class AdminSystem : EntitySystem
     {
         public event Action<List<PlayerInfo>>? PlayerListChanged;
 

Content.Client/Administration/AdminVerbSystem.cs

@@ -9,7 +9,7 @@ namespace Content.Client.Verbs
     /// <summary>
     ///     Client-side admin verb system. These usually open some sort of UIs.
     /// </summary>
-    class AdminVerbSystem : EntitySystem
+    sealed class AdminVerbSystem : EntitySystem
     {
         [Dependency] private readonly IClientConGroupController _clientConGroupController = default!;
         [Dependency] private readonly IClientConsoleHost _clientConsoleHost = default!;

Content.Client/Administration/BwoinkSystem.cs

@@ -20,7 +20,7 @@ using Robust.Shared.Network;
 namespace Content.Client.Administration
 {
     [UsedImplicitly]
-    public class BwoinkSystem : SharedBwoinkSystem
+    public sealed class BwoinkSystem : SharedBwoinkSystem
     {
         [Dependency] private readonly IClientAdminManager _adminManager = default!;
         [Dependency] private readonly IPlayerManager _playerManager = default!;

Content.Client/Administration/Logs/AdminLogSystem.cs

@@ -2,6 +2,6 @@
 
 namespace Content.Client.Administration.Logs;
 
-public class AdminLogSystem : SharedAdminLogSystem
+public sealed class AdminLogSystem : SharedAdminLogSystem
 {
 }

Content.Client/Administration/Managers/ClientAdminManager.cs

@@ -11,7 +11,7 @@ using Robust.Shared.Reflection;
 
 namespace Content.Client.Administration.Managers
 {
-    public class ClientAdminManager : IClientAdminManager, IClientConGroupImplementation, IPostInjectInit
+    public sealed class ClientAdminManager : IClientAdminManager, IClientConGroupImplementation, IPostInjectInit
     {
         [Dependency] private readonly IClientNetManager _netMgr = default!;
         [Dependency] private readonly IClientConGroupController _conGroup = default!;

Content.Client/Administration/Managers/GamePrototypeLoadManager.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Prototypes;
 
 namespace Content.Client.Administration.Managers;
 
-public class GamePrototypeLoadManager : IGamePrototypeLoadManager
+public sealed class GamePrototypeLoadManager : IGamePrototypeLoadManager
 {
     [Dependency] private readonly IClientNetManager _netManager = default!;
     [Dependency] private readonly IPrototypeManager _prototypeManager = default!;

Content.Client/Administration/UI/AdminAnnounceWindow.xaml.cs

@@ -10,7 +10,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Administration.UI
 {
     [GenerateTypedNameReferences]
-    public partial class AdminAnnounceWindow : DefaultWindow
+    public sealed partial class AdminAnnounceWindow : DefaultWindow
     {
         [Dependency] private readonly ILocalizationManager _localization = default!;
 

Content.Client/Administration/UI/AdminMenuWindow.xaml.cs

@@ -9,7 +9,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Administration.UI
 {
     [GenerateTypedNameReferences]
-    public partial class AdminMenuWindow : DefaultWindow
+    public sealed partial class AdminMenuWindow : DefaultWindow
     {
         [Dependency] private readonly IGameHud? _gameHud = default!;
 

Content.Client/Administration/UI/AdminMenuWindowEui.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface.Controls;
 
 namespace Content.Client.Administration.UI
 {
-    public class AdminAnnounceEui : BaseEui
+    public sealed class AdminAnnounceEui : BaseEui
     {
         private readonly AdminAnnounceWindow _window;
 

Content.Client/Administration/UI/BwoinkWindow.xaml.cs

@@ -19,7 +19,7 @@ namespace Content.Client.Administration.UI
     /// This window connects to a BwoinkSystem channel. BwoinkSystem manages the rest.
     /// </summary>
     [GenerateTypedNameReferences]
-    public partial class BwoinkWindow : DefaultWindow
+    public sealed partial class BwoinkWindow : DefaultWindow
     {
         [Dependency] private readonly IClientAdminManager _adminManager = default!;
         [Dependency] private readonly IClientConsoleHost _console = default!;

Content.Client/Administration/UI/CustomControls/AdminLogImpactButton.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface.Controls;
 
 namespace Content.Client.Administration.UI.CustomControls;
 
-public class AdminLogImpactButton : Button
+public sealed class AdminLogImpactButton : Button
 {
     public AdminLogImpactButton(LogImpact impact)
     {

Content.Client/Administration/UI/CustomControls/AdminLogLabel.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface.Controls;
 
 namespace Content.Client.Administration.UI.CustomControls;
 
-public class AdminLogLabel : RichTextLabel
+public sealed class AdminLogLabel : RichTextLabel
 {
     public AdminLogLabel(ref SharedAdminLog log, HSeparator separator)
     {

Content.Client/Administration/UI/CustomControls/AdminLogPlayerButton.cs

@@ -3,7 +3,7 @@ using Robust.Client.UserInterface.Controls;
 
 namespace Content.Client.Administration.UI.CustomControls;
 
-public class AdminLogPlayerButton : Button
+public sealed class AdminLogPlayerButton : Button
 {
     public AdminLogPlayerButton(Guid id)
     {

Content.Client/Administration/UI/CustomControls/AdminLogTypeButton.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface.Controls;
 
 namespace Content.Client.Administration.UI.CustomControls;
 
-public class AdminLogTypeButton : Button
+public sealed class AdminLogTypeButton : Button
 {
     public AdminLogTypeButton(LogType type)
     {

Content.Client/Administration/UI/CustomControls/BwoinkPanel.xaml.cs

@@ -10,7 +10,7 @@ using Robust.Shared.Utility;
 namespace Content.Client.Administration.UI.CustomControls
 {
     [GenerateTypedNameReferences]
-    public partial class BwoinkPanel : BoxContainer
+    public sealed partial class BwoinkPanel : BoxContainer
     {
         private readonly BwoinkSystem _bwoinkSystem;
         public readonly NetUserId ChannelId;

Content.Client/Administration/UI/CustomControls/CommandButton.cs

@@ -4,6 +4,7 @@ using Robust.Shared.IoC;
 
 namespace Content.Client.Administration.UI.CustomControls
 {
+    [Virtual]
     public class CommandButton : Button
     {
         public string? Command { get; set; }

Content.Client/Administration/UI/CustomControls/HSeparator.cs

@@ -5,7 +5,7 @@ using Robust.Shared.Maths;
 
 namespace Content.Client.Administration.UI.CustomControls;
 
-public class HSeparator : Control
+public sealed class HSeparator : Control
 {
     private static readonly Color SeparatorColor = Color.FromHex("#3D4059");
 

Content.Client/Administration/UI/CustomControls/PlayerListControl.xaml.cs

@@ -11,7 +11,7 @@ using Robust.Shared.IoC;
 namespace Content.Client.Administration.UI.CustomControls
 {
     [GenerateTypedNameReferences]
-    public partial class PlayerListControl : BoxContainer
+    public sealed partial class PlayerListControl : BoxContainer
     {
         private readonly AdminSystem _adminSystem;
 

Content.Client/Administration/UI/CustomControls/UICommandButton.cs

@@ -4,7 +4,7 @@ using Robust.Shared.IoC;
 
 namespace Content.Client.Administration.UI.CustomControls
 {
-    public class UICommandButton : CommandButton
+    public sealed class UICommandButton : CommandButton
     {
         public Type? WindowType { get; set; }
         private DefaultWindow? _window;

Content.Client/Administration/UI/CustomControls/VSeparator.cs

@@ -4,7 +4,7 @@ using Robust.Shared.Maths;
 
 namespace Content.Client.Administration.UI.CustomControls;
 
-public class VSeparator : PanelContainer
+public sealed class VSeparator : PanelContainer
 {
     private static readonly Color SeparatorColor = Color.FromHex("#3D4059");
 

Content.Client/Administration/UI/Logs/AdminLogsControl.xaml.cs

@@ -16,7 +16,7 @@ using static Robust.Client.UserInterface.Controls.LineEdit;
 namespace Content.Client.Administration.UI.Logs;
 
 [GenerateTypedNameReferences]
-public partial class AdminLogsControl : Control
+public sealed partial class AdminLogsControl : Control
 {
     private readonly Comparer<AdminLogTypeButton> _adminLogTypeButtonComparer =
         Comparer<AdminLogTypeButton>.Create((a, b) =>

Content.Client/Administration/UI/Logs/AdminLogsEui.cs

@@ -13,7 +13,7 @@ using static Content.Shared.Administration.AdminLogsEuiMsg;
 namespace Content.Client.Administration.UI.Logs;
 
 [UsedImplicitly]
-public class AdminLogsEui : BaseEui
+public sealed class AdminLogsEui : BaseEui
 {
     [Dependency] private readonly IClyde _clyde = default!;
     [Dependency] private readonly IUserInterfaceManager _uiManager = default!;

Content.Client/Administration/UI/Logs/AdminLogsWindow.xaml.cs

@@ -5,7 +5,7 @@ using Robust.Client.UserInterface.XAML;
 namespace Content.Client.Administration.UI.Logs;
 
 [GenerateTypedNameReferences]
-public partial class AdminLogsWindow : DefaultWindow
+public sealed partial class AdminLogsWindow : DefaultWindow
 {
     public AdminLogsWindow()
     {

Content.Client/Administration/UI/SetOutfit/SetOutfitMenu.xaml.cs

@@ -12,7 +12,7 @@ using Robust.Shared.Prototypes;
 namespace Content.Client.Administration.UI.SetOutfit
 {
     [GenerateTypedNameReferences]
-    public partial class SetOutfitMenu : DefaultWindow
+    public sealed partial class SetOutfitMenu : DefaultWindow
     {
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
         [Dependency] private readonly IClientConsoleHost _consoleHost = default!;

Content.Client/Administration/UI/Tabs/AdminTab/AdminShuttleWindow.xaml.cs

@@ -11,7 +11,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Administration.UI.Tabs.AdminTab
 {
     [GenerateTypedNameReferences]
-    public partial class AdminShuttleWindow : DefaultWindow
+    public sealed partial class AdminShuttleWindow : DefaultWindow
     {
         public AdminShuttleWindow()
         {

Content.Client/Administration/UI/Tabs/AdminTab/AdminTab.xaml.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface;
 namespace Content.Client.Administration.UI.Tabs.AdminTab
 {
     [GenerateTypedNameReferences]
-    public partial class AdminTab : Control
+    public sealed partial class AdminTab : Control
     {
     }
 }

Content.Client/Administration/UI/Tabs/AdminTab/BanWindow.xaml.cs

@@ -13,7 +13,7 @@ namespace Content.Client.Administration.UI.Tabs.AdminTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class BanWindow : DefaultWindow
+    public sealed partial class BanWindow : DefaultWindow
     {
         public BanWindow()
         {

Content.Client/Administration/UI/Tabs/AdminTab/PlayerActionsWindow.xaml.cs

@@ -12,7 +12,7 @@ namespace Content.Client.Administration.UI.Tabs.AdminTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class PlayerActionsWindow : DefaultWindow
+    public sealed partial class PlayerActionsWindow : DefaultWindow
     {
         private PlayerInfo? _selectedPlayer;
 

Content.Client/Administration/UI/Tabs/AdminTab/TeleportWindow.xaml.cs

@@ -11,7 +11,7 @@ namespace Content.Client.Administration.UI.Tabs.AdminTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class TeleportWindow : DefaultWindow
+    public sealed partial class TeleportWindow : DefaultWindow
     {
         private PlayerInfo? _selectedPlayer;
 

Content.Client/Administration/UI/Tabs/AdminbusTab/StationEventsWindow.xaml.cs

@@ -14,7 +14,7 @@ namespace Content.Client.Administration.UI.Tabs.AdminbusTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class StationEventsWindow : DefaultWindow
+    public sealed partial class StationEventsWindow : DefaultWindow
     {
         private List<string>? _data;
 

Content.Client/Administration/UI/Tabs/AtmosTab/AddAtmosWindow.xaml.cs

@@ -14,7 +14,7 @@ namespace Content.Client.Administration.UI.Tabs.AtmosTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class AddAtmosWindow : DefaultWindow
+    public sealed partial class AddAtmosWindow : DefaultWindow
     {
         private IEnumerable<IMapGrid>? _data;
 

Content.Client/Administration/UI/Tabs/AtmosTab/AddGasWindow.xaml.cs

@@ -16,7 +16,7 @@ namespace Content.Client.Administration.UI.Tabs.AtmosTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class AddGasWindow : DefaultWindow
+    public sealed partial class AddGasWindow : DefaultWindow
     {
         private IEnumerable<IMapGrid>? _gridData;
         private IEnumerable<GasPrototype>? _gasData;

Content.Client/Administration/UI/Tabs/AtmosTab/AtmosTab.xaml.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface;
 namespace Content.Client.Administration.UI.Tabs.AtmosTab
 {
     [GenerateTypedNameReferences]
-    public partial class AtmosTab : Control
+    public sealed partial class AtmosTab : Control
     {
     }
 }

Content.Client/Administration/UI/Tabs/AtmosTab/FillGasWindow.xaml.cs

@@ -16,7 +16,7 @@ namespace Content.Client.Administration.UI.Tabs.AtmosTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class FillGasWindow : DefaultWindow
+    public sealed partial class FillGasWindow : DefaultWindow
     {
         private IEnumerable<IMapGrid>? _gridData;
         private IEnumerable<GasPrototype>? _gasData;

Content.Client/Administration/UI/Tabs/AtmosTab/SetTemperatureWindow.xaml.cs

@@ -14,7 +14,7 @@ namespace Content.Client.Administration.UI.Tabs.AtmosTab
 {
     [GenerateTypedNameReferences]
     [UsedImplicitly]
-    public partial class SetTemperatureWindow : DefaultWindow
+    public sealed partial class SetTemperatureWindow : DefaultWindow
     {
         private IEnumerable<IMapGrid>? _data;
 

Content.Client/Administration/UI/Tabs/PlayerTab/PlayerTab.xaml.cs

@@ -15,7 +15,7 @@ using Robust.Shared.Maths;
 namespace Content.Client.Administration.UI.Tabs.PlayerTab
 {
     [GenerateTypedNameReferences]
-    public partial class PlayerTab : Control
+    public sealed partial class PlayerTab : Control
     {
         private readonly AdminSystem _adminSystem;
 

Content.Client/Administration/UI/Tabs/PlayerTab/PlayerTabEntry.xaml.cs

@@ -7,7 +7,7 @@ using Robust.Shared.GameObjects;
 namespace Content.Client.Administration.UI.Tabs.PlayerTab;
 
 [GenerateTypedNameReferences]
-public partial class PlayerTabEntry : ContainerButton
+public sealed partial class PlayerTabEntry : ContainerButton
 {
     public EntityUid? PlayerUid;
 

Content.Client/Administration/UI/Tabs/RoundTab.xaml.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface;
 namespace Content.Client.Administration.UI.Tabs
 {
     [GenerateTypedNameReferences]
-    public partial class RoundTab : Control
+    public sealed partial class RoundTab : Control
     {
     }
 }

Content.Client/Administration/UI/Tabs/ServerTab.xaml.cs

@@ -4,7 +4,7 @@ using Robust.Client.UserInterface;
 namespace Content.Client.Administration.UI.Tabs
 {
     [GenerateTypedNameReferences]
-    public partial class ServerTab : Control
+    public sealed partial class ServerTab : Control
     {
     }
 }

Content.Client/Alerts/ClientAlertsSystem.cs

@@ -14,7 +14,7 @@ using Robust.Shared.Prototypes;
 namespace Content.Client.Alerts;
 
 [UsedImplicitly]
-internal class ClientAlertsSystem : AlertsSystem
+internal sealed class ClientAlertsSystem : AlertsSystem
 {
     public AlertOrderPrototype? AlertOrder { get; set; }
 

Content.Client/Alerts/UI/AlertControl.cs

@@ -10,7 +10,7 @@ using Robust.Shared.Timing;
 
 namespace Content.Client.Alerts.UI
 {
-    public class AlertControl : BaseButton
+    public sealed class AlertControl : BaseButton
     {
         // shorter than default tooltip delay so user can more easily
         // see what alerts they have

Content.Client/Alerts/UI/AlertsUI.xaml.cs

@@ -16,7 +16,7 @@ using Robust.Shared.Timing;
 
 namespace Content.Client.Alerts.UI;
 
-public class AlertsFramePresenter : IDisposable
+public sealed class AlertsFramePresenter : IDisposable
 {
     [Dependency] private readonly IEntitySystemManager _systemManager = default!;
     [Dependency] private readonly IUserInterfaceManager _userInterfaceManager = default!;

Content.Client/Arcade/BlockGameMenu.cs

@@ -18,7 +18,7 @@ using static Robust.Client.UserInterface.Controls.BoxContainer;
 
 namespace Content.Client.Arcade
 {
-    public class BlockGameMenu : DefaultWindow
+    public sealed class BlockGameMenu : DefaultWindow
     {
         private static readonly Color OverlayBackgroundColor = new(74,74,81,180);
         private static readonly Color OverlayShadowColor = new(0,0,0,83);

Content.Client/Arcade/SpaceVillainArcadeMenu.cs

@@ -7,7 +7,7 @@ using Vector2 = Robust.Shared.Maths.Vector2;
 
 namespace Content.Client.Arcade
 {
-    public class SpaceVillainArcadeMenu : DefaultWindow
+    public sealed class SpaceVillainArcadeMenu : DefaultWindow
     {
         public SpaceVillainArcadeBoundUserInterface Owner { get; set; }
 
@@ -92,7 +92,7 @@ namespace Content.Client.Arcade
             _enemyActionLabel.Text = message.EnemyActionMessage;
         }
 
-        private class ActionButton : Button
+        private sealed class ActionButton : Button
         {
             private readonly SpaceVillainArcadeBoundUserInterface _owner;
             private readonly SharedSpaceVillainArcadeComponent.PlayerAction _playerAction;

Content.Client/Arcade/UI/BlockGameBoundUserInterface.cs

@@ -4,7 +4,7 @@ using Robust.Shared.GameObjects;
 
 namespace Content.Client.Arcade.UI
 {
-    public class BlockGameBoundUserInterface : BoundUserInterface
+    public sealed class BlockGameBoundUserInterface : BoundUserInterface
     {
         private BlockGameMenu? _menu;
 

Content.Client/Arcade/UI/SpaceVillainArcadeBoundUserInterface.cs

@@ -5,7 +5,7 @@ using static Content.Shared.Arcade.SharedSpaceVillainArcadeComponent;
 
 namespace Content.Client.Arcade.UI
 {
-    public class SpaceVillainArcadeBoundUserInterface : BoundUserInterface
+    public sealed class SpaceVillainArcadeBoundUserInterface : BoundUserInterface
     {
         [ViewVariables] private SpaceVillainArcadeMenu? _menu;
 

Content.Client/Atmos/Components/GasAnalyzerComponent.cs

@@ -12,7 +12,7 @@ using Robust.Shared.ViewVariables;
 namespace Content.Client.Atmos.Components
 {
     [RegisterComponent]
-    internal class GasAnalyzerComponent : SharedGasAnalyzerComponent, IItemStatus
+    internal sealed class GasAnalyzerComponent : SharedGasAnalyzerComponent, IItemStatus
     {
         [ViewVariables(VVAccess.ReadWrite)] private bool _uiUpdateNeeded;
         [ViewVariables] private GasAnalyzerDanger Danger { get; set; }

Content.Client/Atmos/EntitySystems/AtmosphereSystem.cs

@@ -4,7 +4,7 @@ using JetBrains.Annotations;
 namespace Content.Client.Atmos.EntitySystems
 {
     [UsedImplicitly]
-    public class AtmosphereSystem : SharedAtmosphereSystem
+    public sealed class AtmosphereSystem : SharedAtmosphereSystem
     {
     }
 }

Content.Client/Atmos/Monitor/AtmosMonitorVisualizer.cs

@@ -9,7 +9,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 
 namespace Content.Client.Atmos.Monitor
 {
-    public class AtmosMonitorVisualizer : AppearanceVisualizer
+    public sealed class AtmosMonitorVisualizer : AppearanceVisualizer
     {
         [Dependency] IEntityManager _entityManager = default!;
         [DataField("layerMap")]

Content.Client/Atmos/Monitor/UI/AirAlarmBoundUserInterface.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Log;
 
 namespace Content.Client.Atmos.Monitor.UI
 {
-    public class AirAlarmBoundUserInterface : BoundUserInterface
+    public sealed class AirAlarmBoundUserInterface : BoundUserInterface
     {
         private AirAlarmWindow? _window;
 

Content.Client/Atmos/Monitor/UI/AirAlarmWindow.xaml.cs

@@ -16,7 +16,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Atmos.Monitor.UI
 {
     [GenerateTypedNameReferences]
-    public partial class AirAlarmWindow : DefaultWindow
+    public sealed partial class AirAlarmWindow : DefaultWindow
     {
         public event Action<string, IAtmosDeviceData>? AtmosDeviceDataChanged;
         public event Action<AtmosMonitorThresholdType, AtmosAlarmThreshold, Gas?>? AtmosAlarmThresholdChanged;

Content.Client/Atmos/Monitor/UI/Widgets/PumpControl.xaml.cs

@@ -11,7 +11,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Atmos.Monitor.UI.Widgets
 {
     [GenerateTypedNameReferences]
-    public partial class PumpControl : BoxContainer
+    public sealed partial class PumpControl : BoxContainer
     {
         private GasVentPumpData _data;
         private string _address;

Content.Client/Atmos/Monitor/UI/Widgets/ScrubberControl.xaml.cs

@@ -14,7 +14,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Atmos.Monitor.UI.Widgets
 {
     [GenerateTypedNameReferences]
-    public partial class ScrubberControl : BoxContainer
+    public sealed partial class ScrubberControl : BoxContainer
     {
         private GasVentScrubberData _data;
         private string _address;

Content.Client/Atmos/Monitor/UI/Widgets/ThresholdControl.xaml.cs

@@ -12,7 +12,7 @@ using Robust.Shared.Localization;
 namespace Content.Client.Atmos.Monitor.UI.Widgets
 {
     [GenerateTypedNameReferences]
-    public partial class ThresholdControl : BoxContainer
+    public sealed partial class ThresholdControl : BoxContainer
     {
         private AtmosAlarmThreshold _threshold;
         private AtmosMonitorThresholdType _type;
@@ -151,7 +151,7 @@ namespace Content.Client.Atmos.Monitor.UI.Widgets
         }
 
 
-        private class ThresholdBoundControl : BoxContainer
+        private sealed class ThresholdBoundControl : BoxContainer
         {
             // raw values to use in thresholds, prefer these
             // over directly setting Modified(Value/LastValue)

Content.Client/Atmos/Overlays/AtmosDebugOverlay.cs

@@ -10,7 +10,7 @@ using Robust.Shared.Maths;
 
 namespace Content.Client.Atmos.Overlays
 {
-    public class AtmosDebugOverlay : Overlay
+    public sealed class AtmosDebugOverlay : Overlay
     {
         private readonly AtmosDebugOverlaySystem _atmosDebugOverlaySystem;
 

Content.Client/Atmos/UI/GasAnalyzerBoundUserInterface.cs

@@ -4,7 +4,7 @@ using static Content.Shared.Atmos.Components.SharedGasAnalyzerComponent;
 
 namespace Content.Client.Atmos.UI
 {
-    public class GasAnalyzerBoundUserInterface : BoundUserInterface
+    public sealed class GasAnalyzerBoundUserInterface : BoundUserInterface
     {
         public GasAnalyzerBoundUserInterface(ClientUserInterfaceComponent owner, object uiKey) : base(owner, uiKey)
         {

Content.Client/Atmos/UI/GasAnalyzerMenu.cs

@@ -14,7 +14,7 @@ using static Robust.Client.UserInterface.Controls.BoxContainer;
 
 namespace Content.Client.Atmos.UI
 {
-    public class GasAnalyzerWindow : BaseWindow
+    public sealed class GasAnalyzerWindow : BaseWindow
     {
         public GasAnalyzerBoundUserInterface Owner { get; }
 

Content.Client/Atmos/UI/GasCanisterBoundUserInterface.cs

@@ -9,7 +9,7 @@ namespace Content.Client.Atmos.UI
     /// Initializes a <see cref="GasCanisterWindow"/> and updates it when new server messages are received.
     /// </summary>
     [UsedImplicitly]
-    public class GasCanisterBoundUserInterface : BoundUserInterface
+    public sealed class GasCanisterBoundUserInterface : BoundUserInterface
     {
 
         private GasCanisterWindow? _window;

Content.Client/Atmos/UI/GasCanisterWindow.xaml.cs

@@ -11,7 +11,7 @@ namespace Content.Client.Atmos.UI
     /// Client-side UI used to control a canister.
     /// </summary>
     [GenerateTypedNameReferences]
-    public partial class GasCanisterWindow : DefaultWindow
+    public sealed partial class GasCanisterWindow : DefaultWindow
     {
         private readonly ButtonGroup _buttonGroup = new();
 

Content.Client/Atmos/UI/GasFilterBoundUserInterface.cs

@@ -12,7 +12,7 @@ namespace Content.Client.Atmos.UI
     /// Initializes a <see cref="GasFilterWindow"/> and updates it when new server messages are received.
     /// </summary>
     [UsedImplicitly]
-    public class GasFilterBoundUserInterface : BoundUserInterface
+    public sealed class GasFilterBoundUserInterface : BoundUserInterface
     {
 
         private GasFilterWindow? _window;

Content.Client/Atmos/UI/GasFilterWindow.xaml.cs

@@ -14,7 +14,7 @@ namespace Content.Client.Atmos.UI
     /// Client-side UI used to control a gas filter.
     /// </summary>
     [GenerateTypedNameReferences]
-    public partial class GasFilterWindow : DefaultWindow
+    public sealed partial class GasFilterWindow : DefaultWindow
     {
         private readonly ButtonGroup _buttonGroup = new();
 

Content.Client/Atmos/UI/GasMixerBoundUserInteface.cs

@@ -13,7 +13,7 @@ namespace Content.Client.Atmos.UI
     /// Initializes a <see cref="GasMixerWindow"/> and updates it when new server messages are received.
     /// </summary>
     [UsedImplicitly]
-    public class GasMixerBoundUserInterface : BoundUserInterface
+    public sealed class GasMixerBoundUserInterface : BoundUserInterface
     {
 
         private GasMixerWindow? _window;

Content.Client/Atmos/UI/GasMixerWindow.xaml.cs

@@ -19,7 +19,7 @@ namespace Content.Client.Atmos.UI
     /// Client-side UI used to control a gas mixer.
     /// </summary>
     [GenerateTypedNameReferences]
-    public partial class GasMixerWindow : DefaultWindow
+    public sealed partial class GasMixerWindow : DefaultWindow
     {
         public bool MixerStatus = true;
 

Content.Client/Atmos/UI/GasPressurePumpBoundUserInterface.cs

@@ -13,7 +13,7 @@ namespace Content.Client.Atmos.UI
     /// Initializes a <see cref="GasPressurePumpWindow"/> and updates it when new server messages are received.
     /// </summary>
     [UsedImplicitly]
-    public class GasPressurePumpBoundUserInterface : BoundUserInterface
+    public sealed class GasPressurePumpBoundUserInterface : BoundUserInterface
     {
 
         private GasPressurePumpWindow? _window;

Content.Client/Atmos/UI/GasPressurePumpWindow.xaml.cs

@@ -16,7 +16,7 @@ namespace Content.Client.Atmos.UI
     /// Client-side UI used to control a gas pressure pump.
     /// </summary>
     [GenerateTypedNameReferences]
-    public partial class GasPressurePumpWindow : DefaultWindow
+    public sealed partial class GasPressurePumpWindow : DefaultWindow
     {
         public bool PumpStatus = true;
 

Content.Client/Atmos/UI/GasVolumePumpBoundUserInterface.cs

@@ -10,7 +10,7 @@ namespace Content.Client.Atmos.UI
     /// Initializes a <see cref="GasVolumePumpWindow"/> and updates it when new server messages are received.
     /// </summary>
     [UsedImplicitly]
-    public class GasVolumePumpBoundUserInterface : BoundUserInterface
+    public sealed class GasVolumePumpBoundUserInterface : BoundUserInterface
     {
 
         private GasVolumePumpWindow? _window;

Content.Client/Atmos/UI/GasVolumePumpWindow.xaml.cs

@@ -16,7 +16,7 @@ namespace Content.Client.Atmos.UI
     /// Client-side UI used to control a gas volume pump.
     /// </summary>
     [GenerateTypedNameReferences]
-    public partial class GasVolumePumpWindow : DefaultWindow
+    public sealed partial class GasVolumePumpWindow : DefaultWindow
     {
         public bool PumpStatus = true;
 

Content.Client/Atmos/Visualizers/AtmosPlaqueVisualizer.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class AtmosPlaqueVisualizer : AppearanceVisualizer
+    public sealed class AtmosPlaqueVisualizer : AppearanceVisualizer
     {
         [DataField("layer")]
         private int Layer { get; }

Content.Client/Atmos/Visualizers/FireVisualizer.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class FireVisualizer : AppearanceVisualizer
+    public sealed class FireVisualizer : AppearanceVisualizer
     {
         [DataField("fireStackAlternateState")]
         private int _fireStackAlternateState = 3;

Content.Client/Atmos/Visualizers/GasAnalyzerVisualizer.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class GasAnalyzerVisualizer : AppearanceVisualizer
+    public sealed class GasAnalyzerVisualizer : AppearanceVisualizer
     {
         [DataField("state_off")]
         private string? _stateOff;

Content.Client/Atmos/Visualizers/GasCanisterVisualizer.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class GasCanisterVisualizer : AppearanceVisualizer
+    public sealed class GasCanisterVisualizer : AppearanceVisualizer
     {
         [DataField("pressureStates")]
         private readonly string[] _statePressure = {"", "", "", ""};

Content.Client/Atmos/Visualizers/GasFilterVisualizer.cs

@@ -5,7 +5,7 @@ using JetBrains.Annotations;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class GasFilterVisualizer : EnabledAtmosDeviceVisualizer
+    public sealed class GasFilterVisualizer : EnabledAtmosDeviceVisualizer
     {
         protected override object LayerMap => Layers.Enabled;
         protected override Enum DataKey => FilterVisuals.Enabled;

Content.Client/Atmos/Visualizers/GasPortableVisualizer.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class GasPortableVisualizer : AppearanceVisualizer
+    public sealed class GasPortableVisualizer : AppearanceVisualizer
     {
         [DataField("stateConnected")]
         private string? _stateConnected;

Content.Client/Atmos/Visualizers/GasValveVisualizer.cs

@@ -5,7 +5,7 @@ using JetBrains.Annotations;
 namespace Content.Client.Atmos.Visualizers
 {
     [UsedImplicitly]
-    public class GasValveVisualizer : EnabledAtmosDeviceVisualizer
+    public sealed class GasValveVisualizer : EnabledAtmosDeviceVisualizer
     {
         protected override object LayerMap => Layers.Enabled;
         protected override Enum DataKey => FilterVisuals.Enabled;