diff --git a/src/SMAPI.ModBuildConfig.Analyzer/AnalyzerUtilities.cs b/src/SMAPI.ModBuildConfig.Analyzer/AnalyzerUtilities.cs
index 68b5001e..a1ad8aa4 100644
--- a/src/SMAPI.ModBuildConfig.Analyzer/AnalyzerUtilities.cs
+++ b/src/SMAPI.ModBuildConfig.Analyzer/AnalyzerUtilities.cs
@@ -64,7 +64,7 @@ namespace StardewModdingAPI.ModBuildConfig.Analyzer
             }
 
             // conditional access
-            if (node is ConditionalAccessExpressionSyntax conditionalAccess && conditionalAccess.WhenNotNull is MemberBindingExpressionSyntax conditionalBinding)
+            if (node is ConditionalAccessExpressionSyntax { WhenNotNull: MemberBindingExpressionSyntax conditionalBinding } conditionalAccess)
             {
                 declaringType = semanticModel.GetTypeInfo(conditionalAccess.Expression).Type;
                 memberType = semanticModel.GetTypeInfo(node);
diff --git a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/World/ClearCommand.cs b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/World/ClearCommand.cs
index d388f4b0..7935b05f 100644
--- a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/World/ClearCommand.cs
+++ b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/World/ClearCommand.cs
@@ -94,9 +94,8 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands.World
                             this.RemoveObjects(location, obj =>
                                 obj is not Chest
                                 && (
-                                    obj.Name == "Weeds"
-                                    || obj.Name == "Stone"
-                                    || (obj.ParentSheetIndex == 294 || obj.ParentSheetIndex == 295)
+                                    obj.Name is "Weeds" or "Stone"
+                                    || obj.ParentSheetIndex is 294 or 295
                                 )
                             )
                             + this.RemoveResourceClumps(location, clump => this.DebrisClumps.Contains(clump.parentSheetIndex.Value));
diff --git a/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs b/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs
index 9b48fa99..ca313f41 100644
--- a/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs
+++ b/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs
@@ -106,7 +106,7 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework
                 {
                     foreach (int id in this.TryLoad<int, string>("Data\\weapons").Keys)
                     {
-                        yield return this.TryCreate(ItemType.Weapon, id, p => (p.ID >= 32 && p.ID <= 34)
+                        yield return this.TryCreate(ItemType.Weapon, id, p => p.ID is >= 32 and <= 34
                             ? (Item)new Slingshot(p.ID)
                             : new MeleeWeapon(p.ID)
                         );
diff --git a/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs b/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs
index d21ccec0..e16af3a8 100644
--- a/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs
+++ b/src/SMAPI.Toolkit/Framework/ModScanning/ModScanner.cs
@@ -137,7 +137,7 @@ namespace StardewModdingAPI.Toolkit.Framework.ModScanning
                     return new ModFolder(root, searchFolder, ModType.Xnb, null, ModParseError.XnbMod, "it's not a SMAPI mod (see https://smapi.io/xnb for info).");
 
                 // SMAPI installer
-                if (relevantFiles.Any(p => p.Name == "install on Linux.sh" || p.Name == "install on macOS.command" || p.Name == "install on Windows.bat"))
+                if (relevantFiles.Any(p => p.Name is "install on Linux.sh" or "install on macOS.command" or "install on Windows.bat"))
                     return new ModFolder(root, searchFolder, ModType.Invalid, null, ModParseError.ManifestMissing, "the SMAPI installer isn't a mod (you can delete this folder after running the installer file).");
 
                 // not a mod?
diff --git a/src/SMAPI.Toolkit/Serialization/JsonHelper.cs b/src/SMAPI.Toolkit/Serialization/JsonHelper.cs
index 5c465f3c..91c2e9d3 100644
--- a/src/SMAPI.Toolkit/Serialization/JsonHelper.cs
+++ b/src/SMAPI.Toolkit/Serialization/JsonHelper.cs
@@ -48,7 +48,7 @@ namespace StardewModdingAPI.Toolkit.Serialization
             {
                 json = File.ReadAllText(fullPath);
             }
-            catch (Exception ex) when (ex is DirectoryNotFoundException || ex is FileNotFoundException)
+            catch (Exception ex) when (ex is DirectoryNotFoundException or FileNotFoundException)
             {
                 result = default(TModel);
                 return false;
diff --git a/src/SMAPI.Web/Framework/Clients/Chucklefish/ChucklefishClient.cs b/src/SMAPI.Web/Framework/Clients/Chucklefish/ChucklefishClient.cs
index 9689807c..269a04d4 100644
--- a/src/SMAPI.Web/Framework/Clients/Chucklefish/ChucklefishClient.cs
+++ b/src/SMAPI.Web/Framework/Clients/Chucklefish/ChucklefishClient.cs
@@ -58,7 +58,7 @@ namespace StardewModdingAPI.Web.Framework.Clients.Chucklefish
                     .GetAsync(string.Format(this.ModPageUrlFormat, parsedId))
                     .AsString();
             }
-            catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound || ex.Status == HttpStatusCode.Forbidden)
+            catch (ApiException ex) when (ex.Status is HttpStatusCode.NotFound or HttpStatusCode.Forbidden)
             {
                 return page.SetError(RemoteModStatus.DoesNotExist, "Found no Chucklefish mod with this ID.");
             }
diff --git a/src/SMAPI.Web/Framework/Clients/Nexus/NexusClient.cs b/src/SMAPI.Web/Framework/Clients/Nexus/NexusClient.cs
index 571f06bc..a6da0c1c 100644
--- a/src/SMAPI.Web/Framework/Clients/Nexus/NexusClient.cs
+++ b/src/SMAPI.Web/Framework/Clients/Nexus/NexusClient.cs
@@ -75,7 +75,7 @@ namespace StardewModdingAPI.Web.Framework.Clients.Nexus
                 mod = await this.GetModFromApiAsync(parsedId);
 
             // page doesn't exist
-            if (mod == null || mod.Status == NexusModStatus.Hidden || mod.Status == NexusModStatus.NotPublished)
+            if (mod == null || mod.Status is NexusModStatus.Hidden or NexusModStatus.NotPublished)
                 return page.SetError(RemoteModStatus.DoesNotExist, "Found no Nexus mod with this ID.");
 
             // return info
diff --git a/src/SMAPI/Context.cs b/src/SMAPI/Context.cs
index 98d60b78..aa4ecf35 100644
--- a/src/SMAPI/Context.cs
+++ b/src/SMAPI/Context.cs
@@ -23,7 +23,7 @@ namespace StardewModdingAPI
         internal static bool IsSaveLoaded => Game1.hasLoadedGame && Game1.activeClickableMenu is not TitleMenu;
 
         /// <summary>Whether the game is currently writing to the save file.</summary>
-        internal static bool IsSaving => Game1.activeClickableMenu is SaveGameMenu || Game1.activeClickableMenu is ShippingMenu; // saving is performed by SaveGameMenu, but it's wrapped by ShippingMenu on days when the player shipping something
+        internal static bool IsSaving => Game1.activeClickableMenu is SaveGameMenu or ShippingMenu; // saving is performed by SaveGameMenu, but it's wrapped by ShippingMenu on days when the player shipping something
 
         /// <summary>The active split-screen instance IDs.</summary>
         internal static readonly ISet<int> ActiveScreenIds = new HashSet<int>();
@@ -39,7 +39,7 @@ namespace StardewModdingAPI
         }
 
         /// <summary>Whether the in-game world is completely unloaded and not in the process of being loaded. The world may still exist in memory at this point, but should be ignored.</summary>
-        internal static bool IsWorldFullyUnloaded => Context.LoadStage == LoadStage.ReturningToTitle || Context.LoadStage == LoadStage.None;
+        internal static bool IsWorldFullyUnloaded => Context.LoadStage is LoadStage.ReturningToTitle or LoadStage.None;
 
 
         /*********
diff --git a/src/SMAPI/Framework/Content/AssetDataForObject.cs b/src/SMAPI/Framework/Content/AssetDataForObject.cs
index 40f49190..bafd8941 100644
--- a/src/SMAPI/Framework/Content/AssetDataForObject.cs
+++ b/src/SMAPI/Framework/Content/AssetDataForObject.cs
@@ -47,9 +47,9 @@ namespace StardewModdingAPI.Framework.Content
         /// <inheritdoc />
         public TData GetData<TData>()
         {
-            if (this.Data is not TData)
+            if (this.Data is not TData data)
                 throw new InvalidCastException($"The content data of type {this.Data.GetType().FullName} can't be converted to the requested {typeof(TData).FullName}.");
-            return (TData)this.Data;
+            return data;
         }
     }
 }
diff --git a/src/SMAPI/Framework/Input/SInputState.cs b/src/SMAPI/Framework/Input/SInputState.cs
index 5ff7432b..d5feaf94 100644
--- a/src/SMAPI/Framework/Input/SInputState.cs
+++ b/src/SMAPI/Framework/Input/SInputState.cs
@@ -234,7 +234,7 @@ namespace StardewModdingAPI.Framework.Input
                     isDown: pressed.Contains(button)
                 );
 
-                if (button == SButton.MouseLeft || button == SButton.MouseMiddle || button == SButton.MouseRight || button == SButton.MouseX1 || button == SButton.MouseX2)
+                if (button is SButton.MouseLeft or SButton.MouseMiddle or SButton.MouseRight or SButton.MouseX1 or SButton.MouseX2)
                     mouseOverrides[button] = newState;
                 else if (button.TryGetKeyboard(out Keys _))
                     keyboardOverrides[button] = newState;
diff --git a/src/SMAPI/Framework/ModLoading/ModResolver.cs b/src/SMAPI/Framework/ModLoading/ModResolver.cs
index e3386f75..21366bb4 100644
--- a/src/SMAPI/Framework/ModLoading/ModResolver.cs
+++ b/src/SMAPI/Framework/ModLoading/ModResolver.cs
@@ -32,11 +32,8 @@ namespace StardewModdingAPI.Framework.ModLoading
                 ModDataRecordVersionedFields dataRecord = modDatabase.Get(manifest?.UniqueID)?.GetVersionedFields(manifest);
 
                 // apply defaults
-                if (manifest != null && dataRecord != null)
-                {
-                    if (dataRecord.UpdateKey != null)
-                        manifest.UpdateKeys = new[] { dataRecord.UpdateKey };
-                }
+                if (manifest != null && dataRecord?.UpdateKey is not null)
+                    manifest.UpdateKeys = new[] { dataRecord.UpdateKey };
 
                 // build metadata
                 bool shouldIgnore = folder.Type == ModType.Ignored;
diff --git a/src/SMAPI/Framework/ModLoading/Rewriters/HeuristicFieldRewriter.cs b/src/SMAPI/Framework/ModLoading/Rewriters/HeuristicFieldRewriter.cs
index 57f1dd17..2eee8ff9 100644
--- a/src/SMAPI/Framework/ModLoading/Rewriters/HeuristicFieldRewriter.cs
+++ b/src/SMAPI/Framework/ModLoading/Rewriters/HeuristicFieldRewriter.cs
@@ -37,7 +37,7 @@ namespace StardewModdingAPI.Framework.ModLoading.Rewriters
 
             // skip if not broken
             FieldDefinition fieldDefinition = fieldRef.Resolve();
-            if (fieldDefinition != null && !fieldDefinition.HasConstant)
+            if (fieldDefinition?.HasConstant == false)
                 return false;
 
             // rewrite if possible
diff --git a/src/SMAPI/SButton.cs b/src/SMAPI/SButton.cs
index ae825696..133ea901 100644
--- a/src/SMAPI/SButton.cs
+++ b/src/SMAPI/SButton.cs
@@ -674,7 +674,7 @@ namespace StardewModdingAPI
             }
 
             // mouse
-            if (input == SButton.MouseLeft || input == SButton.MouseRight)
+            if (input is SButton.MouseLeft or SButton.MouseRight)
             {
                 button = new InputButton(mouseLeft: input == SButton.MouseLeft);
                 return true;
diff --git a/src/SMAPI/SButtonState.cs b/src/SMAPI/SButtonState.cs
index 5f3e8d3c..ca2dd83d 100644
--- a/src/SMAPI/SButtonState.cs
+++ b/src/SMAPI/SButtonState.cs
@@ -23,7 +23,7 @@ namespace StardewModdingAPI
         /// <param name="state">The button state.</param>
         public static bool IsDown(this SButtonState state)
         {
-            return state == SButtonState.Held || state == SButtonState.Pressed;
+            return state is SButtonState.Held or SButtonState.Pressed;
         }
     }
 }
diff --git a/src/SMAPI/Utilities/Keybind.cs b/src/SMAPI/Utilities/Keybind.cs
index 403ecf4a..7aefe686 100644
--- a/src/SMAPI/Utilities/Keybind.cs
+++ b/src/SMAPI/Utilities/Keybind.cs
@@ -118,11 +118,11 @@ namespace StardewModdingAPI.Utilities
                 return SButtonState.None;
 
             // mix of held + pressed => pressed
-            if (states.All(p => p == SButtonState.Pressed || p == SButtonState.Held))
+            if (states.All(p => p is SButtonState.Pressed or SButtonState.Held))
                 return SButtonState.Pressed;
 
             // mix of held + released => released
-            if (states.All(p => p == SButtonState.Held || p == SButtonState.Released))
+            if (states.All(p => p is SButtonState.Held or SButtonState.Released))
                 return SButtonState.Released;
 
             // not down last tick or now
diff --git a/src/SMAPI/Utilities/KeybindList.cs b/src/SMAPI/Utilities/KeybindList.cs
index f8f569af..f24976f7 100644
--- a/src/SMAPI/Utilities/KeybindList.cs
+++ b/src/SMAPI/Utilities/KeybindList.cs
@@ -139,7 +139,7 @@ namespace StardewModdingAPI.Utilities
         public bool IsDown()
         {
             SButtonState state = this.GetState();
-            return state == SButtonState.Pressed || state == SButtonState.Held;
+            return state is SButtonState.Pressed or SButtonState.Held;
         }
 
         /// <summary>Get whether the input binding was just pressed this tick.</summary>