Update all projects to C# 10

README.md

@@ -84,7 +84,7 @@ On Windows, TweetDuck uses the [CefSharp](https://github.com/cefsharp/CefSharp/)
 
 On Linux, TweetDuck uses the [ChromiumGtk](https://github.com/lunixo/ChromiumGtk) library, which combines [CefGlue](https://gitlab.com/xiliumhq/chromiumembedded/cefglue) for the browser component and [GtkSharp](https://github.com/GtkSharp/GtkSharp) for the GUI.
 
-The solution contains several C# projects for executables and libraries, and F# projects for automated tests. All projects target `.NET 6`.
+The solution contains several C# projects for executables and libraries, and F# projects for automated tests. All projects target `.NET 6` and either `C# 10` or `F#`.
 
 Projects are organized into folders:
 * Windows projects are in the `windows/` folder

lib/TweetLib.Browser.CEF/TweetLib.Browser.CEF.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86;x64</Platforms>
-    <LangVersion>9</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>

lib/TweetLib.Browser/TweetLib.Browser.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86;x64</Platforms>
-    <LangVersion>9</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>

lib/TweetLib.Communication/TweetLib.Communication.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
     <Platforms>x86</Platforms>
-    <LangVersion>9</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>

lib/TweetLib.Core/App.cs

@@ -110,11 +110,11 @@ private static T Validate<T>(T? obj, string name) where T : class {
 	}
 
 	public sealed class AppBuilder {
-		public IAppSetup? Setup { get; set; }
+		public IAppSetup? Setup { get; init; }
-		public IAppErrorHandler? ErrorHandler { get; set; }
+		public IAppErrorHandler? ErrorHandler { get; init; }
-		public IAppSystemHandler? SystemHandler { get; set; }
+		public IAppSystemHandler? SystemHandler { get; init; }
-		public IAppMessageDialogs? MessageDialogs { get; set; }
+		public IAppMessageDialogs? MessageDialogs { get; init; }
-		public IAppFileDialogs? FileDialogs { get; set; }
+		public IAppFileDialogs? FileDialogs { get; init; }
 
 		internal static AppBuilder? Instance { get; private set; }
 

lib/TweetLib.Core/TweetLib.Core.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86;x64</Platforms>
-    <LangVersion>9</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>

lib/TweetLib.Utils/TweetLib.Utils.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86;x64</Platforms>
-    <LangVersion>9</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>

windows/TweetDuck.Browser/TweetDuck.Browser.csproj

@@ -5,7 +5,7 @@
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86</Platforms>
     <RuntimeIdentifier>win7-x86</RuntimeIdentifier>
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
   

windows/TweetDuck.Video/Controls/LabelTooltip.cs

@@ -11,11 +11,11 @@ public LabelTooltip() {
 		}
 
 		public void AttachTooltip(Control control, bool followCursor, string tooltip) {
-			AttachTooltip(control, followCursor, args => tooltip);
+			AttachTooltip(control, followCursor, _ => tooltip);
 		}
 
 		public void AttachTooltip(Control control, bool followCursor, Func<MouseEventArgs, string?> tooltipFunc) {
-			control.MouseMove += (sender, args) => {
+			control.MouseMove += (_, args) => {
 				SuspendLayout();
 
 				Form? form = control.FindForm();

windows/TweetDuck.Video/FormPlayer.cs

@@ -79,7 +79,7 @@ public FormPlayer(IntPtr handle, int dpi, int volume, string url, string token)
 				return $"{(progress / 60):00}:{(progress % 60):00}";
 			});
 
-			labelTooltip.AttachTooltip(trackBarVolume, false, args => $"Volume : {trackBarVolume.Value}%");
+			labelTooltip.AttachTooltip(trackBarVolume, false, _ => $"Volume : {trackBarVolume.Value}%");
 
 			labelTooltip.AttachTooltip(imageClose, false, "Close");
 			labelTooltip.AttachTooltip(imageDownload, false, "Download");

windows/TweetDuck.Video/TweetDuck.Video.csproj

@@ -5,7 +5,7 @@
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86</Platforms>
     <RuntimeIdentifier>win7-x86</RuntimeIdentifier>
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
   

windows/TweetDuck/Application/FileDialogs.cs

@@ -14,7 +14,7 @@ public void SaveFile(SaveFileDialogSettings settings, Action<string> onAccepted)
 					OverwritePrompt = settings.OverwritePrompt,
 					Title = settings.DialogTitle,
 					FileName = settings.FileName,
-					Filter = settings.Filters == null ? null : string.Join("|", settings.Filters.Select(filter => filter.JoinFullNameAndPattern("|")))
+					Filter = settings.Filters == null ? null : string.Join("|", settings.Filters.Select(static filter => filter.JoinFullNameAndPattern("|")))
 				};
 
 				if (dialog.ShowDialog() == DialogResult.OK) {

windows/TweetDuck/Application/SystemHandler.cs

@@ -58,7 +58,7 @@ public void OpenBrowser(string? url) {
 								config.Save();
 							}
 
-							if (result == DialogResult.Ignore || result == DialogResult.Yes) {
+							if (result is DialogResult.Ignore or DialogResult.Yes) {
 								goto case TwitterUrls.UrlType.Fine;
 							}
 						}
@@ -81,7 +81,7 @@ public void OpenFileExplorer(string path) {
 			}
 		}
 
-		public IAppSystemHandler.OpenAssociatedProgramFunc OpenAssociatedProgram { get; } = path => {
+		public IAppSystemHandler.OpenAssociatedProgramFunc OpenAssociatedProgram { get; } = static path => {
 			try {
 				using (Process.Start(new ProcessStartInfo {
 					FileName = path,
@@ -94,7 +94,7 @@ public void OpenFileExplorer(string path) {
 		};
 
 
-		public IAppSystemHandler.CopyImageFromFileFunc CopyImageFromFile { get; } = path => {
+		public IAppSystemHandler.CopyImageFromFileFunc CopyImageFromFile { get; } = static path => {
 			FormManager.RunOnUIThreadAsync(() => {
 				Image image;
 
@@ -109,11 +109,11 @@ public void OpenFileExplorer(string path) {
 			});
 		};
 
-		public IAppSystemHandler.CopyTextFunc CopyText { get; } = text => {
+		public IAppSystemHandler.CopyTextFunc CopyText { get; } = static text => {
 			FormManager.RunOnUIThreadAsync(() => ClipboardManager.SetText(text, TextDataFormat.UnicodeText));
 		};
 
-		public IAppSystemHandler.SearchTextFunc SearchText { get; } = text => {
+		public IAppSystemHandler.SearchTextFunc SearchText { get; } = static text => {
 			if (string.IsNullOrWhiteSpace(text)) {
 				return;
 			}
@@ -138,7 +138,7 @@ void PerformSearch() {
 							return;
 						}
 
-						settings.FormClosed += (sender, args) => {
+						settings.FormClosed += (_, args) => {
 							if (args.CloseReason == CloseReason.UserClosing && config.SearchEngineUrl != searchUrl) {
 								PerformSearch();
 							}

windows/TweetDuck/Browser/Base/CefBrowserComponent.cs

@@ -6,7 +6,7 @@
 
 namespace TweetDuck.Browser.Base {
 	sealed class CefBrowserComponent : BrowserComponentBase {
-		private static readonly CreateContextMenu DefaultContextMenuFactory = handler => new ContextMenuBase(handler);
+		private static readonly CreateContextMenu DefaultContextMenuFactory = static handler => new ContextMenuBase(handler);
 
 		public override string CacheFolder => CefUtils.GetCacheFolder(App.StoragePath);
 		

windows/TweetDuck/Browser/Base/ContextMenuBrowser.cs

@@ -102,14 +102,14 @@ public override void OnContextMenuDismissed(IWebBrowser browserControl, IBrowser
 		public static ContextMenuStrip CreateMenu(FormBrowser form) {
 			ContextMenuStrip menu = new ContextMenuStrip();
 
-			menu.Items.Add(TitleReloadBrowser, null, (sender, args) => form.ReloadToTweetDeck());
+			menu.Items.Add(TitleReloadBrowser, null, (_, _) => form.ReloadToTweetDeck());
-			menu.Items.Add(TitleMuteNotifications, null, (sender, args) => ToggleMuteNotifications());
+			menu.Items.Add(TitleMuteNotifications, null, static (_, _) => ToggleMuteNotifications());
 			menu.Items.Add("-");
-			menu.Items.Add(TitleSettings, null, (sender, args) => form.OpenSettings());
+			menu.Items.Add(TitleSettings, null, (_, _) => form.OpenSettings());
-			menu.Items.Add(TitlePlugins, null, (sender, args) => form.OpenPlugins());
+			menu.Items.Add(TitlePlugins, null, (_, _) => form.OpenPlugins());
-			menu.Items.Add(TitleAboutProgram, null,  (sender, args) => form.OpenAbout());
+			menu.Items.Add(TitleAboutProgram, null, (_, _) => form.OpenAbout());
 
-			menu.Opening += (sender, args) => {
+			menu.Opening += (_, _) => {
 				((ToolStripMenuItem) menu.Items[1]).Checked = Config.MuteNotifications;
 			};
 

windows/TweetDuck/Browser/Base/PopupHandler.cs

@@ -4,7 +4,7 @@
 
 namespace TweetDuck.Browser.Base {
 	sealed class PopupHandler : IPopupHandler {
-		public static PopupHandler Instance { get; } = new PopupHandler();
+		public static PopupHandler Instance { get; } = new ();
 
 		private PopupHandler() {}
 

windows/TweetDuck/Browser/FormBrowser.cs

@@ -94,7 +94,7 @@ public FormBrowser(ResourceCache resourceCache, PluginManager pluginManager, IUp
 			Config.MuteToggled += Config_MuteToggled;
 			Config.TrayBehaviorChanged += Config_TrayBehaviorChanged;
 
-			Disposed += (sender, args) => {
+			Disposed += (_, _) => {
 				Config.MuteToggled -= Config_MuteToggled;
 				Config.TrayBehaviorChanged -= Config_TrayBehaviorChanged;
 				browser.Dispose();
@@ -127,7 +127,7 @@ protected override void Dispose(bool disposing) {
 		}
 
 		private void ShowChildForm(Form form) {
-			form.VisibleChanged += (sender, args) => form.MoveToCenter(this);
+			form.VisibleChanged += (_, _) => form.MoveToCenter(this);
 			form.Show(this);
 		}
 
@@ -286,12 +286,12 @@ void OnFinished() {
 				else {
 					FormUpdateDownload downloadForm = new FormUpdateDownload(update);
 
-					downloadForm.VisibleChanged += (sender2, args2) => {
+					downloadForm.VisibleChanged += (_, _) => {
 						downloadForm.MoveToCenter(this);
 						Hide();
 					};
 
-					downloadForm.FormClosed += (sender2, args2) => {
+					downloadForm.FormClosed += (_, _) => {
 						if (downloadForm.DialogResult != DialogResult.OK) {
 							update.CancelDownload();
 						}
@@ -391,7 +391,7 @@ public void OpenSettings(Type? startTab) {
 
 				FormSettings form = new FormSettings(this, plugins, updates, browser.Functions, startTab);
 
-				form.FormClosed += (sender, args) => {
+				form.FormClosed += (_, _) => {
 					if (!prevEnableUpdateCheck && Config.EnableUpdateCheck) {
 						Config.DismissedUpdate = null;
 						Config.Save();
@@ -469,7 +469,7 @@ private void PlayVideo(string videoUrl, string tweetUrl, string username, IJavas
 			if (playerPath == null || !File.Exists(playerPath)) {
 				if (videoPlayer == null) {
 					videoPlayer = new VideoPlayer(this);
-					videoPlayer.ProcessExited += (sender, args) => browser.HideVideoOverlay(true);
+					videoPlayer.ProcessExited += (_, _) => browser.HideVideoOverlay(true);
 				}
 
 				callShowOverlay.ExecuteAsync();

windows/TweetDuck/Browser/Notification/FormNotificationBase.cs

@@ -95,10 +95,10 @@ protected virtual FormBorderStyle NotificationBorderStyle {
 		protected readonly CefBrowserComponent browserComponent;
 		private readonly NotificationBrowser browserImpl;
 
-		private readonly CefByteArrayResourceHandler resourceHandler = new CefByteArrayResourceHandler();
+		private readonly CefByteArrayResourceHandler resourceHandler = new ();
 
 		private DesktopNotification? currentNotification;
-		private readonly HashSet<NotificationPauseReason> pauseReasons = new HashSet<NotificationPauseReason>();
+		private readonly HashSet<NotificationPauseReason> pauseReasons = new ();
 
 		public string? CurrentTweetUrl => currentNotification?.TweetUrl;
 		public string? CurrentQuoteUrl => currentNotification?.QuoteUrl;
@@ -126,7 +126,7 @@ protected FormNotificationBase(FormBrowser owner, CreateBrowserImplFunc createBr
 
 			Controls.Add(browser);
 
-			Disposed += (sender, args) => {
+			Disposed += (_, _) => {
 				this.owner.FormClosed -= owner_FormClosed;
 				this.browserImpl.Dispose();
 				this.browser.Dispose();

windows/TweetDuck/Browser/Notification/FormNotificationExample.cs

@@ -37,7 +37,7 @@ protected override FormBorderStyle NotificationBorderStyle {
 		private readonly DesktopNotification exampleNotification;
 
 		public FormNotificationExample(FormBrowser owner, ITweetDeckInterface tweetDeckInterface, PluginManager pluginManager) : base(owner, (form, browserComponent) => CreateBrowserImpl(browserComponent, new NotificationInterfaceImpl(form), tweetDeckInterface, pluginManager)) {
-			browserComponent.BrowserLoaded += (sender, args) => {
+			browserComponent.BrowserLoaded += (_, _) => {
 				Ready?.Invoke(this, EventArgs.Empty);
 			};
 

windows/TweetDuck/Browser/Notification/FormNotificationMain.cs

@@ -104,7 +104,7 @@ protected FormNotificationMain(FormBrowser owner, CreateBrowserImplFunc createBr
 			browser.LoadingStateChanged += Browser_LoadingStateChanged;
 
 			mouseHookDelegate = MouseHookProc;
-			Disposed += (sender, args) => StopMouseHook(true);
+			Disposed += (_, _) => StopMouseHook(true);
 		}
 
 		private void SetOpacity(int opacity) {

windows/TweetDuck/Browser/Notification/FormNotificationTweet.cs

@@ -33,7 +33,7 @@ protected override bool CanDragWindow {
 			}
 		}
 
-		private readonly Queue<DesktopNotification> tweetQueue = new Queue<DesktopNotification>(4);
+		private readonly Queue<DesktopNotification> tweetQueue = new (4);
 		private bool needsTrim;
 		private bool hasTemporarilyMoved;
 
@@ -43,7 +43,7 @@ protected override bool CanDragWindow {
 			Config.MuteToggled += Config_MuteToggled;
 			WindowsSessionManager.LockStateChanged += WindowsSessionManager_LockStateChanged;
 			
-			Disposed += (sender, args) => {
+			Disposed += (_, _) => {
 				Config.MuteToggled -= Config_MuteToggled;
 				WindowsSessionManager.LockStateChanged -= WindowsSessionManager_LockStateChanged;
 			};
@@ -66,7 +66,7 @@ protected override void WndProc(ref Message m) {
 			if (m.Msg == 0x00A7) { // WM_NCMBUTTONDOWN
 				int hitTest = m.WParam.ToInt32();
 
-				if (hitTest == 2 || hitTest == 20) { // HTCAPTION, HTCLOSE
+				if (hitTest is 2 or 20) { // HTCAPTION, HTCLOSE
 					hasTemporarilyMoved = false;
 					MoveToVisibleLocation();
 					return;

windows/TweetDuck/Browser/Notification/Screenshot/FormNotificationScreenshotable.cs

@@ -27,7 +27,7 @@ public FormNotificationScreenshotable(Action callback, FormBrowser owner, Plugin
 
 			browserComponent.AttachBridgeObject("$TD_NotificationScreenshot", new ScreenshotBridge(this, SetScreenshotHeight, callback));
 
-			browserComponent.BrowserLoaded += (sender, args) => {
+			browserComponent.BrowserLoaded += (_, _) => {
 				string? script = ResourceUtils.ReadFileOrNull("notification/screenshot/screenshot.js");
 
 				if (script == null) {

windows/TweetDuck/Browser/Notification/Screenshot/TweetScreenshotManager.cs

@@ -101,7 +101,7 @@ private void HandleResult(Task<Image> task) {
 				OnFinished();
 				#else
 				screenshot.MoveToVisibleLocation();
-				screenshot.FormClosed += (sender, args) => disposer.Start();
+				screenshot.FormClosed += (_, _) => disposer.Start();
 				#endif
 			}
 		}

windows/TweetDuck/Browser/Notification/SoundNotification.cs

@@ -1,5 +1,4 @@
-using System.Drawing;
+using System.IO;
-using System.IO;
 using System.Windows.Forms;
 using CefSharp;
 using TweetDuck.Controls;
@@ -54,7 +53,7 @@ private static (byte[] data, string mimeType)? CreateFileHandler(string path) {
 
 					Button btnViewOptions = form.AddButton("View Options");
 					btnViewOptions.Width += 16;
-					btnViewOptions.Location = new Point(btnViewOptions.Location.X - 16, btnViewOptions.Location.Y);
+					btnViewOptions.Location = btnViewOptions.Location with { X = btnViewOptions.Location.X - 16 };
 
 					if (form.ShowDialog() == DialogResult.OK && form.ClickedButton == btnViewOptions) {
 						browser.OpenSettings(typeof(TabSettingsSounds));

windows/TweetDuck/Browser/TrayIcon.cs

@@ -61,7 +61,7 @@ private TrayIcon() {
 			this.notifyIcon.Text = Program.BrandName;
 
 			Config.MuteToggled += Config_MuteToggled;
-			Disposed += (sender, args) => Config.MuteToggled -= Config_MuteToggled;
+			Disposed += (_, _) => Config.MuteToggled -= Config_MuteToggled;
 		}
 
 		public TrayIcon(IContainer container) : this() {
@@ -119,11 +119,11 @@ public static bool ShouldDisplayIcon(this TrayIcon.Behavior behavior) {
 		}
 
 		public static bool ShouldHideOnMinimize(this TrayIcon.Behavior behavior) {
-			return behavior == TrayIcon.Behavior.MinimizeToTray || behavior == TrayIcon.Behavior.Combined;
+			return behavior is TrayIcon.Behavior.MinimizeToTray or TrayIcon.Behavior.Combined;
 		}
 
 		public static bool ShouldHideOnClose(this TrayIcon.Behavior behavior) {
-			return behavior == TrayIcon.Behavior.CloseToTray || behavior == TrayIcon.Behavior.Combined;
+			return behavior is TrayIcon.Behavior.CloseToTray or TrayIcon.Behavior.Combined;
 		}
 	}
 }

windows/TweetDuck/Browser/TweetDeckBrowser.cs

@@ -52,7 +52,7 @@ public TweetDeckBrowser(FormBrowser owner, PluginManager pluginManager, ITweetDe
 			this.browserImpl = new TweetDeckBrowserImpl(browserComponent, tweetDeckInterface, extraContext, new SoundNotification(browserComponent.ResourceHandlerRegistry), pluginManager, updateChecker);
 
 			if (Arguments.HasFlag(Arguments.ArgIgnoreGDPR)) {
-				browserComponent.PageLoadEnd += (sender, args) => {
+				browserComponent.PageLoadEnd += (_, args) => {
 					if (TwitterUrls.IsTweetDeck(args.Url)) {
 						browserComponent.RunScript("gen:gdpr", "TD.storage.Account.prototype.requiresConsent = function() { return false; }");
 					}

windows/TweetDuck/Configuration/UserConfig.cs

@@ -18,7 +18,7 @@ sealed class UserConfig : BaseConfig<UserConfig>, IAppUserConfiguration {
 		[SuppressMessage("ReSharper", "UnusedMember.Global")]
 		public bool AllowDataCollection { get; set; } = false;
 
-		public WindowState BrowserWindow { get; set; } = new WindowState();
+		public WindowState BrowserWindow { get; set; } = new ();
 		public Size PluginsWindowSize    { get; set; } = Size.Empty;
 
 		public bool ExpandLinksOnHover        { get; set; } = true;

windows/TweetDuck/Controls/ControlExtensions.cs

@@ -6,7 +6,7 @@
 
 namespace TweetDuck.Controls {
 	static class ControlExtensions {
-		public static readonly Point InvisibleLocation = new Point(-32000, -32000);
+		public static readonly Point InvisibleLocation = new (-32000, -32000);
 
 		public static void InvokeSafe(this Control control, Action func) {
 			if (control.InvokeRequired) {
@@ -73,7 +73,7 @@ public static bool AlignValueToTick(this TrackBar trackBar) {
 		}
 
 		public static void EnableMultilineShortcuts(this TextBox textBox) {
-			textBox.KeyDown += (sender, args) => {
+			textBox.KeyDown += static (sender, args) => {
 				if (args.Control && args.KeyCode == Keys.A && sender is TextBox tb) {
 					tb.SelectAll();
 					args.SuppressKeyPress = true;

windows/TweetDuck/Dialogs/FormGuide.cs

@@ -36,7 +36,7 @@ private FormGuide(string url, Form owner) {
 
 			Text = Program.BrandName + " Guide";
 			Size = new Size(owner.Size.Width * 3 / 4, owner.Size.Height * 3 / 4);
-			VisibleChanged += (sender, args) => this.MoveToCenter(owner);
+			VisibleChanged += (_, _) => this.MoveToCenter(owner);
 
 			browser = new ChromiumWebBrowser(url) {
 				KeyboardHandler = new CustomKeyboardHandler(null)
@@ -51,7 +51,7 @@ private FormGuide(string url, Form owner) {
 
 			Controls.Add(browser);
 
-			Disposed += (sender, args) => {
+			Disposed += (_, _) => {
 				browserImpl.Dispose();
 				browser.Dispose();
 			};

windows/TweetDuck/Dialogs/FormMessage.cs

@@ -61,7 +61,7 @@ public static bool Show(string caption, string text, MessageBoxIcon icon, string
 
 		private int ClientWidth {
 			get => ClientSize.Width;
-			set => ClientSize = new Size(value, ClientSize.Height);
+			set => ClientSize = ClientSize with { Width = value };
 		}
 
 		private int ButtonDistance {
@@ -105,7 +105,7 @@ public FormMessage(string caption, string text, MessageBoxIcon messageIcon) {
 
 				default:
 					icon = null;
-					labelMessage.Location = new Point(BrowserUtils.Scale(19, dpiScale), labelMessage.Location.Y); // 19 instead of 9 due to larger height
+					labelMessage.Location = labelMessage.Location with { X = BrowserUtils.Scale(19, dpiScale) }; // 19 instead of 9 due to larger height
 					break;
 			}
 
@@ -134,7 +134,7 @@ public Button AddButton(string title, DialogResult result = DialogResult.OK, Con
 				UseVisualStyleBackColor = true
 			};
 
-			button.Click += (sender, args) => {
+			button.Click += (_, _) => {
 				ClickedButton = button;
 				DialogResult = result;
 				Close();
@@ -177,7 +177,7 @@ private void RecalculateButtonLocation() {
 
 			for (int index = 0; index < buttonCount; index++) {
 				Control control = panelActions.Controls[index];
-				control.Location = new Point(start - index * dist, control.Location.Y);
+				control.Location = control.Location with { X = start - index * dist };
 			}
 		}
 
@@ -190,11 +190,11 @@ private void labelMessage_SizeChanged(object? sender, EventArgs e) {
 			int labelOffset = BrowserUtils.Scale(8, dpiScale);
 
 			if (isMultiline && !wasLabelMultiline) {
-				labelMessage.Location = new Point(labelMessage.Location.X, labelMessage.Location.Y - labelOffset);
+				labelMessage.Location = labelMessage.Location with { Y = labelMessage.Location.Y - labelOffset };
 				prevLabelHeight += labelOffset;
 			}
 			else if (!isMultiline && wasLabelMultiline) {
-				labelMessage.Location = new Point(labelMessage.Location.X, labelMessage.Location.Y + labelOffset);
+				labelMessage.Location = labelMessage.Location with { Y = labelMessage.Location.Y + labelOffset };
 				prevLabelHeight -= labelOffset;
 			}
 

windows/TweetDuck/Dialogs/FormPlugins.cs

@@ -31,16 +31,16 @@ public FormPlugins(PluginManager pluginManager) : this() {
 				Size = new Size(Math.Max(MinimumSize.Width, targetSize.Width), Math.Max(MinimumSize.Height, targetSize.Height));
 			}
 
-			Shown += (sender, args) => {
+			Shown += (_, _) => {
 				ReloadPluginList();
 			};
 
-			FormClosed += (sender, args) => {
+			FormClosed += (_, _) => {
 				Config.PluginsWindowSize = Size;
 				Config.Save();
 			};
 
-			ResizeEnd += (sender, args) => {
+			ResizeEnd += (_, _) => {
 				timerLayout.Start();
 			};
 		}
@@ -53,7 +53,7 @@ private void ReloadPluginList() {
 			flowLayoutPlugins.Controls.Clear();
 			flowLayoutPlugins.SuspendLayout();
 
-			foreach (Plugin plugin in pluginManager.Plugins.OrderBy(GetPluginOrderIndex).ThenBy(plugin => plugin.Name)) {
+			foreach (Plugin plugin in pluginManager.Plugins.OrderBy(GetPluginOrderIndex).ThenBy(static plugin => plugin.Name)) {
 				flowLayoutPlugins.Controls.Add(new PluginControl(pluginManager, plugin));
 
 				flowLayoutPlugins.Controls.Add(new Panel {

windows/TweetDuck/Dialogs/FormSettings.cs

@@ -24,7 +24,7 @@ sealed partial class FormSettings : Form, FormManager.IAppDialog {
 
 		private readonly int buttonHeight;
 
-		private readonly Dictionary<Type, SettingsTab> tabs = new Dictionary<Type, SettingsTab>(8);
+		private readonly Dictionary<Type, SettingsTab> tabs = new (8);
 		private SettingsTab? currentTab;
 
 		public FormSettings(FormBrowser browser, PluginManager plugins, UpdateChecker updates, TweetDeckFunctions tweetDeckFunctions, Type? startTab) {
@@ -44,8 +44,8 @@ public FormSettings(FormBrowser browser, PluginManager plugins, UpdateChecker up
 			AddButton("General", () => new TabSettingsGeneral(this.browser.ReloadToTweetDeck, tweetDeckFunctions.ReloadColumns, updates));
 			AddButton("Notifications", () => new TabSettingsNotifications(this.browser.CreateExampleNotification()));
 			AddButton("Sounds", () => new TabSettingsSounds(() => tweetDeckFunctions.PlaySoundNotification(true)));
-			AddButton("Tray", () => new TabSettingsTray());
+			AddButton("Tray", static () => new TabSettingsTray());
-			AddButton("Feedback", () => new TabSettingsFeedback());
+			AddButton("Feedback", static () => new TabSettingsFeedback());
 			AddButton("Advanced", () => new TabSettingsAdvanced(tweetDeckFunctions.ReinjectCustomCSS, this.browser.OpenDevTools));
 
 			SelectTab(tabs[startTab ?? typeof(TabSettingsGeneral)]);
@@ -135,7 +135,7 @@ private void AddButton<T>(string title, Func<T> constructor) where T : BaseTab {
 
 			tabs.Add(typeof(T), new SettingsTab(btn, constructor));
 
-			btn.Click += (sender, args) => SelectTab<T>();
+			btn.Click += (_, _) => SelectTab<T>();
 		}
 
 		private void SelectTab<T>() where T : BaseTab {

windows/TweetDuck/Dialogs/Settings/DialogSettingsManage.cs

@@ -31,7 +31,7 @@ private ProfileManager.Items SelectedItems {
 		public bool ShouldReloadBrowser { get; private set; }
 
 		private readonly PluginManager plugins;
-		private readonly Dictionary<CheckBox, ProfileManager.Items> checkBoxMap = new Dictionary<CheckBox, ProfileManager.Items>(4);
+		private readonly Dictionary<CheckBox, ProfileManager.Items> checkBoxMap = new (4);
 		private readonly bool openImportImmediately;
 
 		private State currentState;

windows/TweetDuck/Dialogs/Settings/TabSettingsAdvanced.cs

@@ -156,11 +156,11 @@ private void btnEditCefArgs_Click(object? sender, EventArgs e) {
 			var parentForm = ParentForm ?? throw new InvalidOperationException("Dialog does not have a parent form!");
 			var form = new DialogSettingsCefArgs(Config.CustomCefArgs);
 
-			form.VisibleChanged += (sender2, args2) => {
+			form.VisibleChanged += (_, _) => {
 				form.MoveToCenter(parentForm);
 			};
 
-			form.FormClosed += (sender2, args2) => {
+			form.FormClosed += (_, _) => {
 				RestoreParentForm();
 
 				if (form.DialogResult == DialogResult.OK) {
@@ -178,11 +178,11 @@ private void btnEditCSS_Click(object? sender, EventArgs e) {
 			var parentForm = ParentForm ?? throw new InvalidOperationException("Dialog does not have a parent form!");
 			var form = new DialogSettingsCSS(Config.CustomBrowserCSS, Config.CustomNotificationCSS, reinjectBrowserCSS, openDevTools);
 
-			form.VisibleChanged += (sender2, args2) => {
+			form.VisibleChanged += (_, _) => {
 				form.MoveToCenter(parentForm);
 			};
 
-			form.FormClosed += (sender2, args2) => {
+			form.FormClosed += (_, _) => {
 				RestoreParentForm();
 
 				if (form.DialogResult == DialogResult.OK) {

windows/TweetDuck/Dialogs/Settings/TabSettingsGeneral.cs

@@ -37,7 +37,7 @@ public TabSettingsGeneral(Action reloadTweetDeck, Action reloadColumns, UpdateCh
 			this.updates = updates;
 			this.updates.CheckFinished += updates_CheckFinished;
 
-			Disposed += (sender, args) => this.updates.CheckFinished -= updates_CheckFinished;
+			Disposed += (_, _) => this.updates.CheckFinished -= updates_CheckFinished;
 
 			// user interface
 
@@ -135,7 +135,7 @@ public TabSettingsGeneral(Action reloadTweetDeck, Action reloadColumns, UpdateCh
 			daysOfWeek.Add(new DayOfWeekItem("Friday", DayOfWeek.Friday));
 			daysOfWeek.Add(new DayOfWeekItem("Saturday", DayOfWeek.Saturday));
 			daysOfWeek.Add(new DayOfWeekItem("Sunday", DayOfWeek.Sunday));
-			comboBoxFirstDayOfWeek.SelectedItem = daysOfWeek.OfType<DayOfWeekItem>().FirstOrDefault(dow => dow.Id == Config.CalendarFirstDay) ?? daysOfWeek[0];
+			comboBoxFirstDayOfWeek.SelectedItem = daysOfWeek.OfType<DayOfWeekItem>().FirstOrDefault(static dow => dow.Id == Config.CalendarFirstDay) ?? daysOfWeek[0];
 		}
 
 		public override void OnReady() {
@@ -219,7 +219,7 @@ private void checkHideTweetsByNftUsers_CheckedChanged(object? sender, EventArgs
 
 		private void checkAnimatedAvatars_CheckedChanged(object? sender, EventArgs e) {
 			Config.EnableAnimatedImages = checkAnimatedAvatars.Checked;
-			BrowserProcessHandler.UpdatePrefs().ContinueWith(task => reloadColumns());
+			BrowserProcessHandler.UpdatePrefs().ContinueWith(_ => reloadColumns());
 		}
 
 		#endregion
@@ -241,11 +241,11 @@ private void updates_CheckFinished(object? sender, UpdateCheckEventArgs e) {
 			if (e.EventId == updateCheckEventId) {
 				btnCheckUpdates.Enabled = true;
 
-				e.Result.Handle(update => {
+				e.Result.Handle(static update => {
 					if (update.VersionTag == Program.VersionTag) {
 						FormMessage.Information("No Updates Available", "Your version of TweetDuck is up to date.", FormMessage.OK);
 					}
-				}, ex => {
+				}, static ex => {
 					App.ErrorHandler.HandleException("Update Check Error", "An error occurred while checking for updates.", true, ex);
 				});
 			}
@@ -264,7 +264,7 @@ private void UpdateBrowserPathSelection() {
 				comboBoxCustomBrowser.SelectedIndex = browserListIndexDefault;
 			}
 			else {
-				WindowsUtils.Browser? browserInfo = comboBoxCustomBrowser.Items.OfType<WindowsUtils.Browser>().FirstOrDefault(browser => browser.Path == Config.BrowserPath);
+				WindowsUtils.Browser? browserInfo = comboBoxCustomBrowser.Items.OfType<WindowsUtils.Browser>().FirstOrDefault(static browser => browser.Path == Config.BrowserPath);
 
 				if (browserInfo == null || Config.BrowserPathArgs != null) {
 					comboBoxCustomBrowser.SelectedIndex = browserListIndexCustom;
@@ -368,7 +368,7 @@ private void UpdateSearchEngineSelection() {
 				comboBoxSearchEngine.SelectedIndex = searchEngineIndexDefault;
 			}
 			else {
-				SearchEngine? engineInfo = comboBoxSearchEngine.Items.OfType<SearchEngine>().FirstOrDefault(engine => engine.Url == Config.SearchEngineUrl);
+				SearchEngine? engineInfo = comboBoxSearchEngine.Items.OfType<SearchEngine>().FirstOrDefault(static engine => engine.Url == Config.SearchEngineUrl);
 
 				if (engineInfo == null) {
 					comboBoxSearchEngine.SelectedIndex = searchEngineIndexCustom;

windows/TweetDuck/Dialogs/Settings/TabSettingsNotifications.cs

@@ -15,7 +15,7 @@ public TabSettingsNotifications(FormNotificationExample notification) {
 
 			this.notification = notification;
 
-			this.notification.Ready += (sender, args) => {
+			this.notification.Ready += (_, _) => {
 				this.InvokeAsyncSafe(() => {
 					this.notification.ShowExampleNotification(true);
 					this.notification.Move += notification_Move;
@@ -25,7 +25,7 @@ public TabSettingsNotifications(FormNotificationExample notification) {
 
 			this.notification.Show();
 
-			Disposed += (sender, args) => this.notification.Dispose();
+			Disposed += (_, _) => this.notification.Dispose();
 
 			// general
 
@@ -45,7 +45,7 @@ public TabSettingsNotifications(FormNotificationExample notification) {
 			comboBoxIdlePause.Items.Add("1 minute");
 			comboBoxIdlePause.Items.Add("2 minutes");
 			comboBoxIdlePause.Items.Add("5 minutes");
-			comboBoxIdlePause.SelectedIndex = Math.Max(0, Array.FindIndex(IdlePauseSeconds, val => val == Config.NotificationIdlePauseSeconds));
+			comboBoxIdlePause.SelectedIndex = Math.Max(0, Array.FindIndex(IdlePauseSeconds, static val => val == Config.NotificationIdlePauseSeconds));
 
 			trackBarOpacity.SetValueSafe(Config.NotificationWindowOpacity);
 			labelOpacityValue.Text = Config.NotificationWindowOpacity + "%";

windows/TweetDuck/Management/BrowserCache.cs

@@ -14,7 +14,7 @@ static class BrowserCache {
 		private static Timer? autoClearTimer;
 
 		private static long CalculateCacheSize() {
-			return new DirectoryInfo(CacheFolder).EnumerateFiles().Select(file => {
+			return new DirectoryInfo(CacheFolder).EnumerateFiles().Select(static file => {
 				try {
 					return file.Length;
 				} catch {
@@ -37,7 +37,7 @@ public static void RefreshTimer() {
 				autoClearTimer = null;
 			}
 			else if (shouldRun && autoClearTimer == null) {
-				autoClearTimer = new Timer(state => {
+				autoClearTimer = new Timer(static _ => {
 					if (autoClearTimer != null) {
 						try {
 							if (CalculateCacheSize() >= Program.Config.System.ClearCacheThreshold * 1024L * 1024L) {

windows/TweetDuck/Management/ClipboardManager.cs

@@ -7,8 +7,8 @@
 
 namespace TweetDuck.Management {
 	static class ClipboardManager {
-		private static readonly Lazy<Regex> RegexStripHtmlStyles = new Lazy<Regex>(() => new Regex(@"\s?(?:style|class)="".*?"""), false);
+		private static readonly Lazy<Regex> RegexStripHtmlStyles = new (static () => new Regex(@"\s?(?:style|class)="".*?"""), false);
-		private static readonly Lazy<Regex> RegexOffsetClipboardHtml = new Lazy<Regex>(() => new Regex(@"(?<=EndHTML:|EndFragment:)(\d+)"), false);
+		private static readonly Lazy<Regex> RegexOffsetClipboardHtml = new (static () => new Regex(@"(?<=EndHTML:|EndFragment:)(\d+)"), false);
 
 		public static void SetText(string text, TextDataFormat format) {
 			if (string.IsNullOrEmpty(text)) {

windows/TweetDuck/Management/LockManager.cs

@@ -127,7 +127,7 @@ private static bool CloseProcess(Process process) {
 				else {
 					return false;
 				}
-			} catch (Exception ex) when (ex is InvalidOperationException || ex is Win32Exception) {
+			} catch (Exception ex) when (ex is InvalidOperationException or Win32Exception) {
 				bool hasExited = CheckProcessExited(process);
 				process.Dispose();
 				return hasExited;

windows/TweetDuck/Management/ProfileManager.cs

@@ -176,7 +176,7 @@ public bool Import(Items items) {
 										Expires = DateTime.Now.Add(TimeSpan.FromDays(365 * 5)),
 										HttpOnly = true,
 										Secure = true
-									}).ContinueWith(t => {
+									}).ContinueWith(_ => {
 										// ReSharper disable once AccessToDisposedClosure
 										// ReSharper disable once ConvertToLambdaExpression
 										return cookies.FlushStoreAsync();

windows/TweetDuck/Program.cs

@@ -135,7 +135,7 @@ public void Launch(ResourceCache resourceCache, PluginManager pluginManager) {
 
 				Cef.Initialize(settings, false, new BrowserProcessHandler());
 
-				Win.Application.ApplicationExit += (sender, args) => ExitCleanup();
+				Win.Application.ApplicationExit += static (_, _) => ExitCleanup();
 				var updateCheckClient = new UpdateCheckClient(Path.Combine(storagePath, InstallerFolder));
 				var mainForm = new FormBrowser(resourceCache, pluginManager, updateCheckClient, lockManager.WindowRestoreMessage);
 				Win.Application.Run(mainForm);

windows/TweetDuck/Reporter.cs

@@ -47,7 +47,7 @@ public void HandleException(string caption, string message, bool canIgnore, Exce
 					UseVisualStyleBackColor = true
 				};
 
-				btnOpenLog.Click += (sender, args) => {
+				btnOpenLog.Click += static (_, _) => {
 					if (!OpenLogFile()) {
 						FormMessage.Error("Error Log", "Cannot open error log.", FormMessage.OK);
 					}

windows/TweetDuck/TweetDuck.csproj

@@ -5,7 +5,7 @@
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86</Platforms>
     <RuntimeIdentifier>win7-x86</RuntimeIdentifier>
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
   

windows/TweetDuck/Utils/BrowserUtils.cs

@@ -50,7 +50,7 @@ public static void SetupDockOnLoad(IBrowserComponent browserComponent, ChromiumW
 			browser.Dock = DockStyle.None;
 			browser.Location = ControlExtensions.InvisibleLocation;
 
-			browserComponent.BrowserLoaded += (sender, args) => {
+			browserComponent.BrowserLoaded += (_, _) => {
 				browser.InvokeAsyncSafe(() => {
 					browser.Location = Point.Empty;
 					browser.Dock = DockStyle.Fill;
@@ -68,9 +68,9 @@ void UpdateZoomLevel(object? sender, EventArgs args) {
 			}
 
 			Config.ZoomLevelChanged += UpdateZoomLevel;
-			browser.Disposed += (sender, args) => Config.ZoomLevelChanged -= UpdateZoomLevel;
+			browser.Disposed += (_, _) => Config.ZoomLevelChanged -= UpdateZoomLevel;
 
-			browser.FrameLoadStart += (sender, args) => {
+			browser.FrameLoadStart += static (_, args) => {
 				if (args.Frame.IsMain && Config.ZoomLevel != 100) {
 					SetZoomLevel(args.Browser.GetHost(), Config.ZoomLevel);
 				}

windows/TweetDuck/Utils/NativeMethods.cs

@@ -8,8 +8,8 @@ namespace TweetDuck.Utils {
 	[SuppressMessage("ReSharper", "MemberCanBePrivate.Local")]
 	[SuppressMessage("ReSharper", "InconsistentNaming")]
 	static class NativeMethods {
-		private static readonly IntPtr HWND_BROADCAST = new IntPtr(0xFFFF);
+		private static readonly IntPtr HWND_BROADCAST = new (0xFFFF);
-		public static readonly IntPtr HOOK_HANDLED = new IntPtr(-1);
+		public static readonly IntPtr HOOK_HANDLED = new (-1);
 
 		public const int HWND_TOPMOST = -1;
 		public const uint SWP_NOACTIVATE = 0x0010;

windows/TweetImpl.CefSharp/Adapters/CefAdapter.cs

@@ -4,7 +4,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefAdapter : ICefAdapter {
-		public static CefAdapter Instance { get; } = new CefAdapter();
+		public static CefAdapter Instance { get; } = new ();
 
 		private CefAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefDragDataAdapter.cs

@@ -3,7 +3,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefDragDataAdapter : IDragDataAdapter<IDragData> {
-		public static CefDragDataAdapter Instance { get; } = new CefDragDataAdapter();
+		public static CefDragDataAdapter Instance { get; } = new ();
 
 		private CefDragDataAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefErrorCodeAdapter.cs

@@ -4,7 +4,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefErrorCodeAdapter : IErrorCodeAdapter<CefErrorCode> {
-		public static CefErrorCodeAdapter Instance { get; } = new CefErrorCodeAdapter();
+		public static CefErrorCodeAdapter Instance { get; } = new ();
 
 		private CefErrorCodeAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefFileDialogCallbackAdapter.cs

@@ -4,7 +4,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefFileDialogCallbackAdapter : IFileDialogCallbackAdapter<IFileDialogCallback> {
-		public static CefFileDialogCallbackAdapter Instance { get; } = new CefFileDialogCallbackAdapter();
+		public static CefFileDialogCallbackAdapter Instance { get; } = new ();
 
 		private CefFileDialogCallbackAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefFrameAdapter.cs

@@ -3,7 +3,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefFrameAdapter : IFrameAdapter<IFrame> {
-		public static CefFrameAdapter Instance { get; } = new CefFrameAdapter();
+		public static CefFrameAdapter Instance { get; } = new ();
 
 		private CefFrameAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefJsDialogCallbackAdapter.cs

@@ -3,7 +3,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefJsDialogCallbackAdapter : IJsDialogCallbackAdapter<IJsDialogCallback> {
-		public static CefJsDialogCallbackAdapter Instance { get; } = new CefJsDialogCallbackAdapter();
+		public static CefJsDialogCallbackAdapter Instance { get; } = new ();
 
 		private CefJsDialogCallbackAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefMenuModelAdapter.cs

@@ -3,7 +3,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefMenuModelAdapter : IMenuModelAdapter<IMenuModel> {
-		public static CefMenuModelAdapter Instance { get; } = new CefMenuModelAdapter();
+		public static CefMenuModelAdapter Instance { get; } = new ();
 
 		private CefMenuModelAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefRequestAdapter.cs

@@ -3,7 +3,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefRequestAdapter : IRequestAdapter<IRequest> {
-		public static CefRequestAdapter Instance { get; } = new CefRequestAdapter();
+		public static CefRequestAdapter Instance { get; } = new ();
 
 		private CefRequestAdapter() {}
 

windows/TweetImpl.CefSharp/Adapters/CefResponseAdapter.cs

@@ -3,7 +3,7 @@
 
 namespace TweetImpl.CefSharp.Adapters {
 	sealed class CefResponseAdapter : IResponseAdapter<IResponse> {
-		public static CefResponseAdapter Instance { get; } = new CefResponseAdapter();
+		public static CefResponseAdapter Instance { get; } = new ();
 
 		private CefResponseAdapter() {}
 

windows/TweetImpl.CefSharp/Component/BrowserComponentBase.cs

@@ -12,7 +12,7 @@ namespace TweetImpl.CefSharp.Component {
 	public abstract class BrowserComponentBase : BrowserComponent<IFrame, IRequest> {
 		public delegate CefContextMenuHandler CreateContextMenu(IContextMenuHandler? handler);
 
-		public ResourceHandlerRegistry<IResourceHandler> ResourceHandlerRegistry { get; } = new ResourceHandlerRegistry<IResourceHandler>(CefResourceHandlerFactory.Instance);
+		public ResourceHandlerRegistry<IResourceHandler> ResourceHandlerRegistry { get; } = new (CefResourceHandlerFactory.Instance);
 
 		private readonly ChromiumWebBrowser browser;
 		private readonly CreateContextMenu createContextMenu;

windows/TweetImpl.CefSharp/Dialogs/FileDialogOpener.cs

@@ -7,7 +7,7 @@
 
 namespace TweetImpl.CefSharp.Dialogs {
 	sealed class FileDialogOpener : IFileDialogOpener {
-		public static FileDialogOpener Instance { get; } = new FileDialogOpener();
+		public static FileDialogOpener Instance { get; } = new ();
 
 		private FileDialogOpener() {}
 
@@ -17,7 +17,7 @@ public void OpenFile(string title, bool multiple, List<FileDialogFilter> filters
 				DereferenceLinks = true,
 				Multiselect = multiple,
 				Title = title,
-				Filter = string.Join("|", filters.Select(filter => filter.JoinFullNameAndPattern("|")))
+				Filter = string.Join("|", filters.Select(static filter => filter.JoinFullNameAndPattern("|")))
 			};
 
 			if (dialog.ShowDialog() == DialogResult.OK) {

windows/TweetImpl.CefSharp/Handlers/CefByteArrayResourceHandler.cs

@@ -8,7 +8,7 @@
 
 namespace TweetImpl.CefSharp.Handlers {
 	public sealed class CefByteArrayResourceHandler : IResourceHandler {
-		private static readonly ByteArrayResourceHandlerLogic.WriteToOut<Stream> WriteToOut = delegate (Stream dataOut, byte[] dataIn, int position, int length) {
+		private static readonly ByteArrayResourceHandlerLogic.WriteToOut<Stream> WriteToOut = static delegate (Stream dataOut, byte[] dataIn, int position, int length) {
 			dataOut.Write(dataIn, position, length);
 		};
 

windows/TweetImpl.CefSharp/Handlers/CefResourceHandlerFactory.cs

@@ -4,7 +4,7 @@
 
 namespace TweetImpl.CefSharp.Handlers {
 	sealed class CefResourceHandlerFactory : IResourceHandlerFactory<IResourceHandler> {
-		public static CefResourceHandlerFactory Instance { get; } = new CefResourceHandlerFactory();
+		public static CefResourceHandlerFactory Instance { get; } = new ();
 
 		private CefResourceHandlerFactory() {}
 

windows/TweetImpl.CefSharp/TweetImpl.CefSharp.csproj

@@ -5,7 +5,7 @@
     <Configurations>Debug;Release</Configurations>
     <Platforms>x86</Platforms>
     <RuntimeIdentifier>win7-x86</RuntimeIdentifier>
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>10</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>