C# 12: Use collection initializers

NAPS2.App.Tests/Appium/LanguageSelectionTests.cs

@@ -11,7 +11,7 @@ namespace NAPS2.App.Tests.Appium;
 [Collection("appium")]
 public class LanguageSelectionTests : AppiumTests
 {
-    private static readonly HashSet<string> ExpectedMissingLanguages = new() { "bn", "hi", "id", "th", "ur" };
+    private static readonly HashSet<string> ExpectedMissingLanguages = ["bn", "hi", "id", "th", "ur"];
 
     [VerifyTheory(AllowDebug = true, WindowsAppium = true)]
     [ClassData(typeof(AppiumTestData))]

NAPS2.Images.Gtk/GtkImage.cs

@@ -78,7 +78,7 @@ public class GtkImage : IMemoryImage
         }
         if (imageFormat == ImageFileFormat.Tiff)
         {
-            ((GtkImageContext) ImageContext).TiffIo.SaveTiff(new List<IMemoryImage> { this }, path);
+            ((GtkImageContext) ImageContext).TiffIo.SaveTiff([this], path);
             return;
         }
         ImageContext.CheckSupportsFormat(imageFormat);
@@ -97,7 +97,7 @@ public class GtkImage : IMemoryImage
         }
         if (imageFormat == ImageFileFormat.Tiff)
         {
-            ((GtkImageContext) ImageContext).TiffIo.SaveTiff(new List<IMemoryImage> { this }, stream);
+            ((GtkImageContext) ImageContext).TiffIo.SaveTiff([this], stream);
             return;
         }
         ImageContext.CheckSupportsFormat(imageFormat);

NAPS2.Internals/Serialization/XmlSerializer.cs

@@ -18,13 +18,13 @@ public abstract class XmlSerializer
 
     protected static readonly Dictionary<Type, List<CustomXmlTypes>> CustomTypesCache = new();
 
-    protected static readonly List<Type> ArrayLikeTypes = new()
+    protected static readonly List<Type> ArrayLikeTypes =
-    {
+    [
         typeof(List<>),
         typeof(HashSet<>),
         typeof(ImmutableList<>),
-        typeof(ImmutableHashSet<>),
+        typeof(ImmutableHashSet<>)
-    };
+    ];
 
     protected static readonly Dictionary<Type, XmlTypeInfo> TypeInfoCache = new()
     {
@@ -79,7 +79,7 @@ public abstract class XmlSerializer
     {
         lock (TypeInfoCache)
         {
-            CustomTypesCache.GetOrSet(type, new List<CustomXmlTypes>()).Add(customTypes);
+            CustomTypesCache.GetOrSet(type, []).Add(customTypes);
         }
     }
 

NAPS2.Internals/Threading/AsyncSink.cs

@@ -5,10 +5,7 @@ public class AsyncSink<T> where T : class
 {
     private static TaskCompletionSource<T?> CreateTcs() => new(TaskCreationOptions.RunContinuationsAsynchronously);
 
-    private readonly List<TaskCompletionSource<T?>> _items = new()
+    private readonly List<TaskCompletionSource<T?>> _items = [CreateTcs()];
-    {
-        CreateTcs()
-    };
     private bool _completed;
 
     public async IAsyncEnumerable<T> AsAsyncEnumerable()

NAPS2.Internals/Threading/SmoothProgress.cs

@@ -39,9 +39,9 @@ public class SmoothProgress : IDisposable
 
             _stopwatch = Stopwatch.StartNew();
 
-            _previousInputPos = new LinkedList<double>();
+            _previousInputPos = [];
             _previousInputPos.AddLast(0);
-            _previousInputTimes = new LinkedList<long>();
+            _previousInputTimes = [];
             _previousInputTimes.AddLast(0);
         }
     }

NAPS2.Internals/Util/CollectionExtensions.cs

@@ -13,7 +13,7 @@ public static class CollectionExtensions
     /// <returns></returns>
     public static HashSet<T> ToHashSet<T>(this IEnumerable<T> enumerable)
     {
-        return new HashSet<T>(enumerable);
+        return [..enumerable];
     }
 #endif
 
@@ -134,7 +134,7 @@ public static class CollectionExtensions
     {
         if (!dict.ContainsKey(key))
         {
-            dict[key] = new HashSet<TValue>();
+            dict[key] = [];
         }
         dict[key].Add(value);
     }
@@ -152,7 +152,7 @@ public static class CollectionExtensions
     {
         if (!dict.ContainsKey(key))
         {
-            dict[key] = new HashSet<TValue>();
+            dict[key] = [];
         }
         foreach (var value in values)
         {

NAPS2.Internals/Util/DisposableSet.cs

@@ -2,7 +2,7 @@ namespace NAPS2.Util;
 
 public class DisposableSet<T> : IDisposable where T : IDisposable
 {
-    private readonly HashSet<T> _set = new();
+    private readonly HashSet<T> _set = [];
 
     public void Add(T obj)
     {

NAPS2.Lib.Gtk/EtoForms/Gtk/GtkListView.cs

@@ -24,7 +24,7 @@ public class GtkListView<T> : IListView<T> where T : notnull
     private bool _refreshing;
     private readonly ScrolledWindow _scrolledWindow;
     private readonly FlowBox _flowBox;
-    private List<Entry> _entries = new();
+    private List<Entry> _entries = [];
 
     public GtkListView(ListViewBehavior<T> behavior)
     {

NAPS2.Lib.Mac/EtoForms/Mac/ListViewDataSource.cs

@@ -18,7 +18,7 @@ public class ListViewDataSource<T> : NSCollectionViewDataSource where T : notnul
         _itemActivated = itemActivated;
     }
 
-    public List<T> Items { get; } = new();
+    public List<T> Items { get; } = [];
 
     public override nint GetNumberofItems(NSCollectionView collectionView, nint section)
     {

NAPS2.Lib.Mac/EtoForms/Ui/MacDesktopForm.cs

@@ -186,8 +186,8 @@ public class MacDesktopForm : DesktopForm
 
     private List<NSToolbarItem?> CreateMacToolbarItems()
     {
-        return new List<NSToolbarItem?>
+        return
-        {
+        [
             MacToolbarItems.Create("scan", Commands.Scan),
             MacToolbarItems.Create("profiles", Commands.Profiles),
             MacToolbarItems.CreateSpace(),
@@ -214,7 +214,7 @@ public class MacDesktopForm : DesktopForm
 #pragma warning restore CA1422
 #pragma warning restore CA1416
             }
-        };
+        ];
     }
 
     protected override LayoutElement GetZoomButtons() => C.Spacer();

NAPS2.Lib.Mac/EtoForms/Ui/MacPreviewForm.cs

@@ -50,8 +50,8 @@ public class MacPreviewForm : PreviewForm
 
     private List<NSToolbarItem?> CreateMacToolbarItems()
     {
-        return new List<NSToolbarItem?>
+        return
-        {
+        [
             MacToolbarItems.Create("prev", GoToPrevCommand, nav: true),
             MacToolbarItems.Create("next", GoToNextCommand, nav: true),
             MacToolbarItems.CreateMenu("rotate", Commands.RotateMenu, new MenuProvider()
@@ -81,7 +81,7 @@ public class MacPreviewForm : PreviewForm
 #pragma warning restore CA1422
 #pragma warning restore CA1416
             }
-        };
+        ];
     }
 
     private void ZoomUpdated(NSSlider sender)

NAPS2.Lib.Tests/Dependencies/DownloadControllerTests.cs

@@ -54,7 +54,7 @@ public class DownloadControllerTests : ContextualTests
     [Fact]
     public async void NoUrl()
     {
-        DownloadInfo info = new("", new List<DownloadMirror>(), 0, "0000000000000000000000000000000000000000", DownloadFormat.Gzip);
+        DownloadInfo info = new("", [], 0, "0000000000000000000000000000000000000000", DownloadFormat.Gzip);
 
         var mockHandler = Substitute.For<Action<string>>();
 
@@ -75,7 +75,7 @@ public class DownloadControllerTests : ContextualTests
 
         _controller.DownloadError += mockHandler;
 
-        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz", new List<DownloadMirror>() { new DownloadMirror(DummyValidUrl) }, 0, "THIS IS NOT AN SHA1 AND WILL FAIL", DownloadFormat.Gzip));
+        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz", [new DownloadMirror(DummyValidUrl)], 0, "THIS IS NOT AN SHA1 AND WILL FAIL", DownloadFormat.Gzip));
 
         _controller.QueueFile(_mockComponent);
         Assert.False(await _controller.StartDownloadsAsync());
@@ -90,7 +90,8 @@ public class DownloadControllerTests : ContextualTests
     [Fact]
     public async void InvalidMirrorsChecksum()
     {
-        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz", new List<DownloadMirror>() { new DownloadMirror(DummyInvalidUrl), new DownloadMirror(DummyValidUrl) }, 0, StockDogJpegSHA1, DownloadFormat.Gzip));
+        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz",
+            [new DownloadMirror(DummyInvalidUrl), new DownloadMirror(DummyValidUrl)], 0, StockDogJpegSHA1, DownloadFormat.Gzip));
 
         _httpHandler.Expect(DummyInvalidUrl).Respond("application/zip", _animalsZipStream);
         _httpHandler.Expect(DummyValidUrl).Respond("application/gzip", _dogsGzipStream);
@@ -110,7 +111,7 @@ public class DownloadControllerTests : ContextualTests
     [Fact]
     public async void Valid()
     {
-        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz", new List<DownloadMirror>() { new DownloadMirror(DummyValidUrl) }, 0, StockDogJpegSHA1, DownloadFormat.Gzip));
+        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz", [new DownloadMirror(DummyValidUrl)], 0, StockDogJpegSHA1, DownloadFormat.Gzip));
 
         _httpHandler.Expect(DummyValidUrl).Respond("application/gzip", _dogsGzipStream);
 
@@ -129,7 +130,8 @@ public class DownloadControllerTests : ContextualTests
     [Fact]
     public async void ValidUsingMirrorUrl()
     {
-        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz", new List<DownloadMirror>() { new DownloadMirror(DummyInvalidUrl), new DownloadMirror(DummyValidUrl) }, 0, StockDogJpegSHA1, DownloadFormat.Gzip));
+        _mockComponent.DownloadInfo.Returns(new DownloadInfo("temp.gz",
+            [new DownloadMirror(DummyInvalidUrl), new DownloadMirror(DummyValidUrl)], 0, StockDogJpegSHA1, DownloadFormat.Gzip));
 
         _httpHandler.Expect(DummyInvalidUrl);
         _httpHandler.Expect(DummyValidUrl).Respond("application/gzip", _dogsGzipStream);

NAPS2.Lib.WinForms/EtoForms/WinForms/WinFormsImageList.cs

@@ -31,7 +31,7 @@ public abstract class WinFormsImageList<T> where T : notnull
 
     public class Custom : WinFormsImageList<T>
     {
-        private readonly List<Image> _images = new();
+        private readonly List<Image> _images = [];
 
         public Custom(WinFormsListView<T> listView, ListViewBehavior<T> behavior) : base(listView, behavior)
         {

NAPS2.Lib.WinForms/ImportExport/PrintDocumentPrinter.cs

@@ -53,7 +53,7 @@ public class PrintDocumentPrinter : IScannedImagePrinter
                 imagesToPrint = images.Skip(start).Take(length).ToList();
                 break;
             default:
-                imagesToPrint = new List<ProcessedImage>();
+                imagesToPrint = [];
                 break;
         }
         if (imagesToPrint.Count == 0)

NAPS2.Lib.WinForms/Scan/Twain/Legacy/TwainApi.cs

@@ -88,7 +88,7 @@ internal static class TwainApi
             _settings = settings;
             _tw = tw;
             _form = form;
-            Bitmaps = new List<IMemoryImage>();
+            Bitmaps = [];
             form.Activated += FTwainGui_Activated;
         }
 

NAPS2.Lib/Automation/AutomatedScanning.cs

@@ -96,7 +96,7 @@ public class AutomatedScanning
                 return;
             }
 
-            _scanList = new List<List<ProcessedImage>>();
+            _scanList = [];
 
             if (_options.ImportPath != null)
             {
@@ -571,7 +571,7 @@ public class AutomatedScanning
         _config.Run.Set(c => c.PdfSettings.Compat, compat);
 
         int scanIndex = 0;
-        _actualOutputPaths = new List<string>();
+        _actualOutputPaths = [];
         foreach (var fileContents in _scanList)
         {
             var op = _operationFactory.Create<SavePdfOperation>();
@@ -625,7 +625,7 @@ public class AutomatedScanning
             }
             OutputVerbose(ConsoleResources.StartingScan, i, _options.Number);
             _pagesScanned = 0;
-            _scanList.Add(new List<ProcessedImage>());
+            _scanList.Add([]);
             var scanParams = new ScanParams
             {
                 NoUI = !_options.Progress,

NAPS2.Lib/Config/StubProfileManager.cs

@@ -5,7 +5,7 @@ namespace NAPS2.Config;
 
 public class StubProfileManager : IProfileManager
 {
-    private readonly List<ScanProfile> _profiles = new List<ScanProfile>();
+    private readonly List<ScanProfile> _profiles = [];
 
     public ImmutableList<ScanProfile> Profiles => ImmutableList.CreateRange(_profiles);
 

NAPS2.Lib/EtoForms/EtoOperationProgress.cs

@@ -10,7 +10,7 @@ public class EtoOperationProgress : OperationProgress
     private readonly INotify _notify;
     private readonly Naps2Config _config;
 
-    private readonly HashSet<IOperation> _activeOperations = new();
+    private readonly HashSet<IOperation> _activeOperations = [];
 
     public EtoOperationProgress(IFormFactory formFactory, INotify notify, Naps2Config config)
     {

NAPS2.Lib/EtoForms/Layout/LayoutLine.cs

@@ -145,8 +145,8 @@ public abstract class LayoutLine : LayoutContainer
         }
         // If we aren't aligned or we don't have a parent to do that pre-calculation, then we just determine our cell
         // sizes and scaling directly without any special alignment constraints.
-        cellLengths = new List<float>();
+        cellLengths = [];
-        cellScaling = new List<bool>();
+        cellScaling = [];
         var lengthChildContext = childContext with { IsCellLengthQuery = true };
         foreach (var child in Children)
         {

NAPS2.Lib/EtoForms/MenuProvider.cs

@@ -4,7 +4,7 @@ namespace NAPS2.EtoForms;
 
 public class MenuProvider
 {
-    private readonly List<Item> _items = new();
+    private readonly List<Item> _items = [];
 
     public MenuProvider Dynamic(ListProvider<Command> commandListProvider)
     {

NAPS2.Lib/EtoForms/Notifications/NotificationManager.cs

@@ -7,7 +7,7 @@ public class NotificationManager
         ColorScheme = colorScheme;
     }
 
-    public List<NotificationModel> Notifications { get; } = new();
+    public List<NotificationModel> Notifications { get; } = [];
     
     public ColorScheme ColorScheme { get; }
 

NAPS2.Lib/EtoForms/Ui/DesktopForm.cs

@@ -153,8 +153,8 @@ public abstract class DesktopForm : EtoFormBase
         {
             // TODO: Remove icon from delete command somehow
             // TODO: Is this memory leaking (because of event handlers) when commands are converted to menuitems?
-            _contextMenu.Items.AddRange(new List<MenuItem>
+            _contextMenu.Items.AddRange(
-            {
+            [
                 Commands.ViewImage,
                 new SeparatorMenuItem(),
                 Commands.SelectAll,
@@ -162,15 +162,15 @@ public abstract class DesktopForm : EtoFormBase
                 Commands.Paste,
                 new SeparatorMenuItem(),
                 Commands.Delete
-            });
+            ]);
         }
         else
         {
-            _contextMenu.Items.AddRange(new List<MenuItem>
+            _contextMenu.Items.AddRange(
-            {
+            [
                 Commands.SelectAll,
                 Commands.Paste
-            });
+            ]);
         }
     }
 

NAPS2.Lib/EtoForms/Ui/OcrDownloadForm.cs

@@ -77,7 +77,7 @@ public class OcrDownloadForm : EtoDialogBase
 
     private HashSet<string> SelectedLanguageComponents
     {
-        get { return new HashSet<string>(_languageList.Selection.Select(lang => $"ocr-{lang.Code}")); }
+        get { return [.._languageList.Selection.Select(lang => $"ocr-{lang.Code}")]; }
     }
 
     private void Download()

NAPS2.Lib/EtoForms/Ui/PdfSettingsForm.cs

@@ -21,8 +21,8 @@ public class PdfSettingsForm : EtoDialogBase
     private readonly CheckBox _rememberSettings = new() { Text = UiStrings.RememberTheseSettings };
     private readonly Button _restoreDefaults = new() { Text = UiStrings.RestoreDefaults };
 
-    private readonly List<CheckBox> _permissions = new()
+    private readonly List<CheckBox> _permissions =
-    {
+    [
         new CheckBox { Text = UiStrings.AllowPrinting },
         new CheckBox { Text = UiStrings.AllowFullQualityPrinting },
         new CheckBox { Text = UiStrings.AllowDocumentModification },
@@ -31,7 +31,7 @@ public class PdfSettingsForm : EtoDialogBase
         new CheckBox { Text = UiStrings.AllowContentCopyingForAccessibility },
         new CheckBox { Text = UiStrings.AllowAnnotations },
         new CheckBox { Text = UiStrings.AllowFormFilling }
-    };
+    ];
 
     private readonly DropDown _compat = C.EnumDropDown<PdfCompat>(compat => compat switch
     {

NAPS2.Lib/EtoForms/Ui/SelectDeviceForm.cs

@@ -11,7 +11,7 @@ public class SelectDeviceForm : EtoDialogBase
     private readonly ErrorOutput _errorOutput;
     private readonly ListBox _devices = new();
     private readonly Button _selectDevice;
-    private readonly List<ScanDevice> _lazyDeviceList = new();
+    private readonly List<ScanDevice> _lazyDeviceList = [];
     // TODO: The spinner doesn't seem to animate on WinForms
     private readonly Spinner _spinner = new() { Enabled = true };
 

NAPS2.Lib/Images/ImageListDiffer.cs

@@ -12,7 +12,7 @@ using TrimOperation = ListViewDiffs<UiImage>.TrimOperation;
 public class ImageListDiffer
 {
     private readonly UiImageList _imageList;
-    private List<ImageRenderState> _currentState = new();
+    private List<ImageRenderState> _currentState = [];
 
     public ImageListDiffer(UiImageList imageList)
     {

NAPS2.Lib/Images/UiImageList.cs

@@ -8,7 +8,7 @@ public class UiImageList
     private ListSelection<UiImage> _selection;
     private StateToken _savedState = new(ImmutableList<ProcessedImage.WeakReference>.Empty);
 
-    public UiImageList() : this(new List<UiImage>())
+    public UiImageList() : this([])
     {
     }
 

NAPS2.Lib/Images/UndoStack.cs

@@ -12,7 +12,7 @@ public class UndoStack : IDisposable
     public UndoStack(int maxLength)
     {
         _maxLength = maxLength;
-        _stack = new LinkedList<Memento>();
+        _stack = [];
         _stack.AddFirst(Memento.Empty);
         _current = _stack.First!;
     }

NAPS2.Lib/ImportExport/SaveSeparatorHelper.cs

@@ -47,7 +47,7 @@ internal static class SaveSeparatorHelper
                         if (images.Count > 0)
                         {
                             yield return images;
-                            images = new List<ProcessedImage>();
+                            images = [];
                         }
                     }
                     else

NAPS2.Lib/Ocr/OcrOperationManager.cs

@@ -48,7 +48,7 @@ public class OcrOperationManager
             }
             op = _currentOp;
             op.Status.MaxProgress += 1;
-            _ongoingTasks.GetOrSet((OcrController) sender!, () => new HashSet<Task>()).Add(e.ResultTask);
+            _ongoingTasks.GetOrSet((OcrController) sender!, () => []).Add(e.ResultTask);
         }
         op.InvokeStatusChanged();
         if (newOp)

NAPS2.Lib/Ocr/TesseractLanguageManager.cs

@@ -4,11 +4,11 @@ namespace NAPS2.Ocr;
 
 public class TesseractLanguageManager
 {
-    private static readonly List<DownloadMirror> Mirrors = new()
+    private static readonly List<DownloadMirror> Mirrors =
-    {
+    [
         new(@"https://github.com/cyanfish/naps2-components/releases/download/tesseract-4.0.0b4/{0}"),
         new(@"https://sourceforge.net/projects/naps2/files/components/tesseract-4.0.0b4/{0}/download")
-    };
+    ];
 
     private readonly TesseractLanguageData _languageData = TesseractLanguageData.Latest;
 

NAPS2.Lib/Recovery/RecoveryIndex.cs

@@ -8,7 +8,7 @@ public class RecoveryIndex
 
     public RecoveryIndex()
     {
-        Images = new List<RecoveryIndexImage>();
+        Images = [];
     }
 
     public int Version { get; set; }

NAPS2.Lib/Scan/Batch/BatchScanPerformer.cs

@@ -93,7 +93,7 @@ public class BatchScanPerformer : IBatchScanPerformer
                 OcrCancelToken = _cancelToken,
                 ThumbnailSize = thumbnailController.RenderSize
             };
-            _scans = new List<List<ProcessedImage>>();
+            _scans = [];
         }
 
         public async Task Do()

NAPS2.Sdk.Tests/Asserts/ImageAsserts.cs

@@ -144,7 +144,7 @@ public static class ImageAsserts
 
     public class PixelColorData : IEnumerable<((int x, int y), (int r, int g, int b))>
     {
-        private readonly List<((int x, int y), (int r, int g, int b))> _colors = new();
+        private readonly List<((int x, int y), (int r, int g, int b))> _colors = [];
 
         public void Add((int x, int y) pos, (int r, int g, int b) color)
         {

NAPS2.Sdk.Tests/Images/BlankDetectorTests.cs

@@ -48,11 +48,11 @@ public class BlankDetectorTests : ContextualTests
         return image.CopyWithPixelFormat(pixelFormat);
     }
 
-    public static IEnumerable<object[]> TestCases = new List<object[]>
+    public static IEnumerable<object[]> TestCases =
-    {
+    [
         new object[] { ImagePixelFormat.ARGB32 },
         new object[] { ImagePixelFormat.RGB24 },
         new object[] { ImagePixelFormat.Gray8 },
         new object[] { ImagePixelFormat.BW1 }
-    };
+    ];
 }

NAPS2.Sdk.Tests/Images/LoadSaveTests.cs

@@ -278,8 +278,8 @@ public class LoadSaveTests : ContextualTests
         (byte[]) ImageResources.ResourceManager.GetObject(resource, CultureInfo.InvariantCulture);
 
     // TODO: Ignore resolution by default in the existing tests, but have separate tests/test cases for resolution
-    public static IEnumerable<object[]> TestCases = new List<object[]>
+    public static IEnumerable<object[]> TestCases =
-    {
+    [
         new object[]
         {
             ImageFileFormat.Png, ".png", "dog_alpha",
@@ -387,5 +387,5 @@ public class LoadSaveTests : ContextualTests
             new[] { ImagePixelFormat.RGB24, ImagePixelFormat.RGB24, ImagePixelFormat.RGB24 }, false
         },
 #endif
-    };
+    ];
 }

NAPS2.Sdk.Tests/Images/TransformTests.cs

@@ -462,8 +462,8 @@ public class TransformTests : ContextualTests
         Assert.True(IsDisposed(original));
     }
 
-    public static IEnumerable<object[]> CommutativeGrayTransforms = new List<object[]>
+    public static IEnumerable<object[]> CommutativeGrayTransforms =
-    {
+    [
         // Note that hue and saturation aren't commutative with grayscale as the the grayscale transform weighs each
         // color channel differently
         new object[] { new BrightnessTransform(300) },
@@ -472,5 +472,5 @@ public class TransformTests : ContextualTests
         new object[] { new RotationTransform(46) },
         new object[] { new ThumbnailTransform() },
         new object[] { new CropTransform(10, 10, 10, 10) }
-    };
+    ];
 }

NAPS2.Sdk.Tests/Mocks/StubScanBridge.cs

@@ -6,9 +6,9 @@ namespace NAPS2.Sdk.Tests.Mocks;
 
 internal class StubScanBridge : IScanBridge
 {
-    public List<ScanDevice> MockDevices { get; set; } = new();
+    public List<ScanDevice> MockDevices { get; set; } = [];
 
-    public List<ProcessedImage> MockOutput { get; set; } = new();
+    public List<ProcessedImage> MockOutput { get; set; } = [];
         
     public Exception Error { get; set; }
 

NAPS2.Sdk.Tests/Scan/ScanErrorHandling.cs

@@ -81,7 +81,7 @@ public class ScanErrorHandling : ContextualTests
     public async void Scan_LocalPostProcess()
     {
         var localPostProcessor = Substitute.For<ILocalPostProcessor>();
-        var bridge = new StubScanBridge { MockOutput = new List<ProcessedImage> { CreateScannedImage() } };
+        var bridge = new StubScanBridge { MockOutput = [CreateScannedImage()] };
         var bridgeFactory = Substitute.For<IScanBridgeFactory>();
         var controller =
             new ScanController(ScanningContext, localPostProcessor, new ScanOptionsValidator(),

NAPS2.Sdk.Tests/Scan/TwainImageProcessorTests.cs

@@ -30,7 +30,7 @@ public class TwainImageProcessorTests : ContextualTests
         _scanEvents = Substitute.For<IScanEvents>();
         _callback = Substitute.For<Action<IMemoryImage>>();
 
-        _images = new List<IMemoryImage>();
+        _images = [];
         _callback.When(x => x(Arg.Any<IMemoryImage>()))
             .Do(x => _images.Add((IMemoryImage) x[0]));
 

NAPS2.Sdk.Tests/Worker/WorkerChannelTests.cs

@@ -88,11 +88,11 @@ public class WorkerChannelTests : ContextualTests
     {
         var remoteScanController = new MockRemoteScanController
         {
-            Images = new List<ProcessedImage>
+            Images =
-            {
+            [
                 CreateScannedImage(),
                 CreateScannedImage()
-            }
+            ]
         };
 
         using var channel = Start(remoteScanController);
@@ -113,11 +113,11 @@ public class WorkerChannelTests : ContextualTests
     {
         var remoteScanController = new MockRemoteScanController
         {
-            Images = new List<ProcessedImage>
+            Images =
-            {
+            [
                 CreateScannedImage(),
                 CreateScannedImage()
-            },
+            ],
             Exception = new DeviceException("Test error")
         };
         using var channel = Start(remoteScanController);
@@ -161,7 +161,7 @@ public class WorkerChannelTests : ContextualTests
 
     private class MockRemoteScanController : IRemoteScanController
     {
-        public List<ProcessedImage> Images { get; set; } = new();
+        public List<ProcessedImage> Images { get; set; } = [];
 
         public Exception Exception { get; set; }
 

NAPS2.Sdk/ImportExport/Email/EmailMessage.cs

@@ -2,19 +2,13 @@
 
 public class EmailMessage
 {
-    public EmailMessage()
-    {
-        Recipients = new List<EmailRecipient>();
-        Attachments = new List<EmailAttachment>();
-    }
-
     public string? Subject { get; set; }
 
     public string? BodyText { get; set; }
 
-    public List<EmailRecipient> Recipients { get; set; }
+    public List<EmailRecipient> Recipients { get; set; } = [];
 
-    public List<EmailAttachment> Attachments { get; set; }
+    public List<EmailAttachment> Attachments { get; set; } = [];
 
     /// <summary>
     /// Gets or sets a value indicating whether the email should be sent automatically without prompting the user to make changes first.

NAPS2.Sdk/Ocr/OcrRequestQueue.cs

@@ -13,7 +13,7 @@ internal class OcrRequestQueue
 {
     private readonly Dictionary<OcrRequestParams, OcrRequest> _requestCache = new();
     private Semaphore _queueWaitHandle = new(0, int.MaxValue);
-    private List<Task> _workerTasks = new();
+    private List<Task> _workerTasks = [];
     private CancellationTokenSource _workerCts = new();
 
     /// <summary>
@@ -94,7 +94,7 @@ internal class OcrRequestQueue
             if (_workerTasks.Count > 0 && !hasPending)
             {
                 _workerCts.Cancel();
-                _workerTasks = new List<Task>();
+                _workerTasks = [];
                 _workerCts = new CancellationTokenSource();
                 _queueWaitHandle = new Semaphore(0, int.MaxValue);
             }

NAPS2.Sdk/Pdf/PdfExporter.cs

@@ -457,7 +457,7 @@ public class PdfExporter : IPdfExporter
     private static string ReverseText(string text)
     {
         TextElementEnumerator enumerator = StringInfo.GetTextElementEnumerator(text);
-        List<string> elements = new List<string>();
+        var elements = new List<string>();
         while (enumerator.MoveNext())
         {
             elements.Add(enumerator.GetTextElement());

NAPS2.Sdk/Remoting/Server/ScanJob.cs

@@ -99,7 +99,7 @@ internal class ScanJob : IEsclScanJob
         if (ContentType == "application/pdf")
         {
             var pdfExporter = new PdfExporter(_scanningContext);
-            await pdfExporter.Export(stream, new List<ProcessedImage> { _enumerable.Current });
+            await pdfExporter.Export(stream, [_enumerable.Current]);
         }
     }
 

NAPS2.Sdk/Scan/BarcodeDetector.cs

@@ -23,7 +23,7 @@ internal static class BarcodeDetector
         var zxingOptions = options.ZXingOptions ?? new DecodingOptions
         {
             TryHarder = true,
-            PossibleFormats = options.PatchTOnly ? new List<BarcodeFormat> { PATCH_T_FORMAT } : null
+            PossibleFormats = options.PatchTOnly ? [PATCH_T_FORMAT] : null
         };
         var reader = new BarcodeReader<IMemoryImage>(x => new MemoryImageLuminanceSource(x))
         {

NAPS2.Tools/Localization/TranslatableString.cs

@@ -12,5 +12,5 @@ public class TranslatableString
 
     public string? Translation { get; }
 
-    public List<string> Context { get; } = new List<string>();
+    public List<string> Context { get; } = [];
 }

NAPS2.Tools/Program.cs

@@ -59,7 +59,7 @@ public static class Program
 
     public class CommandList
     {
-        private readonly List<Type> _optionTypes = new();
+        private readonly List<Type> _optionTypes = [];
         private readonly Dictionary<Type, Type> _optionTypeToCommandType = new();
 
         public CommandList Add<TOption, TCommand>() where TOption : OptionsBase where TCommand : ICommand<TOption>

NAPS2.Tools/Project/Packaging/PackageInfo.cs

@@ -4,8 +4,8 @@ namespace NAPS2.Tools.Project.Packaging;
 
 public class PackageInfo
 {
-    private readonly List<PackageFile> _files = new();
+    private readonly List<PackageFile> _files = [];
-    private readonly HashSet<string> _destPaths = new();
+    private readonly HashSet<string> _destPaths = [];
 
     public PackageInfo(Platform platform, string versionName, string versionNumber, string? packageName)
     {
@@ -30,7 +30,7 @@ public class PackageInfo
 
     public IEnumerable<PackageFile> Files => _files;
 
-    public HashSet<string> Languages { get; } = new();
+    public HashSet<string> Languages { get; } = [];
 
     public void AddFile(FileInfo file, string destFolder, string? destFileName = null)
     {