Upgrade to .NET 10.0

.editorconfig

@@ -98,7 +98,7 @@ dotnet_naming_rule.public_static_readonly_all_upper.style = all_upper
 #Formatting - indentation options
 csharp_indent_case_contents = true
 csharp_indent_case_contents_when_block = false
-csharp_indent_labels = one_less_than_current
+csharp_indent_labels = no_change
 csharp_indent_switch_labels = true
 
 #Formatting - new line options
@@ -160,19 +160,19 @@ csharp_style_expression_bodied_properties = true:warning
 csharp_style_expression_bodied_local_functions = true:silent
 
 #Style - expression preferences
-dotnet_style_object_initializer = true:warning
+dotnet_style_object_initializer = true:silent
 dotnet_style_collection_initializer = true:warning
 dotnet_style_prefer_inferred_anonymous_type_member_names = true:warning
 dotnet_style_prefer_auto_properties = true:warning
 dotnet_style_prefer_conditional_expression_over_assignment = true:silent
 dotnet_style_prefer_conditional_expression_over_return = true:silent
-dotnet_style_prefer_compound_assignment = true:warning
+dotnet_style_prefer_compound_assignment = true:silent
 
 #Style - null/type checks
-dotnet_style_coalesce_expression = true:warning
-dotnet_style_null_propagation = true:warning
+dotnet_style_coalesce_expression = true:silent
+dotnet_style_null_propagation = true:silent
 csharp_style_pattern_matching_over_is_with_cast_check = true:warning
-csharp_style_pattern_matching_over_as_with_null_check = true:warning
+csharp_style_pattern_matching_over_as_with_null_check = true:silent
 csharp_style_throw_expression = true:silent
 csharp_style_conditional_delegate_call = true:warning
 
@@ -183,8 +183,8 @@ csharp_style_unused_value_expression_statement_preference = discard_variable:sil
 csharp_style_unused_value_assignment_preference = discard_variable:warning
 
 #Style - variable declaration
-csharp_style_inlined_variable_declaration = true:warning
-csharp_style_deconstructed_variable_declaration = false:silent
+csharp_style_inlined_variable_declaration = true:silent
+csharp_style_deconstructed_variable_declaration = true:silent
 
 #Style - other C# 7.x features
 dotnet_style_prefer_inferred_tuple_names = true:warning
@@ -193,17 +193,20 @@ csharp_style_pattern_local_over_anonymous_function = true:warning
 dotnet_style_prefer_is_null_check_over_reference_equality_method = true:silent
 
 #Style - C# 8 features
-csharp_prefer_static_local_function = true:warning
+csharp_prefer_static_local_function = true:silent
 csharp_prefer_simple_using_statement = true:silent
-csharp_style_prefer_index_operator = false:silent
-csharp_style_prefer_range_operator = false:silent
+csharp_style_prefer_index_operator = true:silent
+csharp_style_prefer_range_operator = true:silent
 csharp_style_prefer_switch_expression = false:none
 
-csharp_style_namespace_declarations = block_scoped:warning
+#Style - C# 9 features
+csharp_style_prefer_pattern_matching = false:none
 
 #Style - C# 12 features
 csharp_style_prefer_primary_constructors = false
 
+csharp_style_namespace_declarations = block_scoped:warning
+
 [*.{yaml,yml}]
 insert_final_newline = true
 indent_style = space

.github/workflows/ci.yml

@@ -164,7 +164,7 @@ jobs:
 
   build-only-ios:
     name: Build only (iOS)
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 60
     steps:
       - name: Checkout
@@ -178,10 +178,8 @@ jobs:
       - name: Install .NET Workloads
         run: dotnet workload install ios
 
-      # https://github.com/dotnet/macios/issues/19157
-      # https://github.com/actions/runner-images/issues/12758
-      - name: Use Xcode 16.4
-        run: sudo xcode-select -switch /Applications/Xcode_16.4.app
+      - name: Use Xcode 26.6
+        run: sudo xcode-select -switch /Applications/Xcode_26.6.app
 
       - name: Build
         run: dotnet build -c Debug osu.iOS.slnf

Directory.Build.props

@@ -7,6 +7,8 @@
     <GenerateAssemblyInfo Condition="'$(Configuration)'=='Debug'">false</GenerateAssemblyInfo>
     <!-- Required due to the above  -->
     <NoWarn Condition="'$(Configuration)'=='Debug'">$(NoWarn);CA1416</NoWarn>
+    <!-- https://github.com/dotnet/runtime/issues/129562 -->
+    <SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings>
   </PropertyGroup>
   <PropertyGroup>
     <ApplicationManifest>$(MSBuildThisFileDirectory)app.manifest</ApplicationManifest>

Templates/Rulesets/ruleset-empty/osu.Game.Rulesets.EmptyFreeform.Tests/osu.Game.Rulesets.EmptyFreeform.Tests.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <RootNamespace>osu.Game.Rulesets.EmptyFreeform.Tests</RootNamespace>
   </PropertyGroup>
 </Project>

Templates/Rulesets/ruleset-empty/osu.Game.Rulesets.EmptyFreeform/osu.Game.Rulesets.EmptyFreeform.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <AssemblyTitle>osu.Game.Rulesets.EmptyFreeform</AssemblyTitle>
     <OutputType>Library</OutputType>
     <PlatformTarget>AnyCPU</PlatformTarget>

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon.Tests/osu.Game.Rulesets.Pippidon.Tests.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <RootNamespace>osu.Game.Rulesets.Pippidon.Tests</RootNamespace>
   </PropertyGroup>
 </Project>

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon/UI/PippidonCursorContainer.cs

@@ -27,8 +27,7 @@ private void load(TextureStore textures)
         {
             cursorTexture = textures.Get("character");
 
-            if (cursorSprite != null)
-                cursorSprite.Texture = cursorTexture;
+            cursorSprite?.Texture = cursorTexture;
         }
     }
 }

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon/osu.Game.Rulesets.Pippidon.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <AssemblyTitle>osu.Game.Rulesets.Pippidon</AssemblyTitle>
     <OutputType>Library</OutputType>
     <PlatformTarget>AnyCPU</PlatformTarget>

Templates/Rulesets/ruleset-scrolling-empty/osu.Game.Rulesets.EmptyScrolling.Tests/osu.Game.Rulesets.EmptyScrolling.Tests.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <RootNamespace>osu.Game.Rulesets.EmptyScrolling.Tests</RootNamespace>
   </PropertyGroup>
 </Project>

Templates/Rulesets/ruleset-scrolling-empty/osu.Game.Rulesets.EmptyScrolling/osu.Game.Rulesets.EmptyScrolling.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <AssemblyTitle>osu.Game.Rulesets.EmptyScrolling</AssemblyTitle>
     <OutputType>Library</OutputType>
     <PlatformTarget>AnyCPU</PlatformTarget>

Templates/Rulesets/ruleset-scrolling-example/osu.Game.Rulesets.Pippidon.Tests/osu.Game.Rulesets.Pippidon.Tests.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <RootNamespace>osu.Game.Rulesets.Pippidon.Tests</RootNamespace>
   </PropertyGroup>
 </Project>

Templates/Rulesets/ruleset-scrolling-example/osu.Game.Rulesets.Pippidon/osu.Game.Rulesets.Pippidon.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <AssemblyTitle>osu.Game.Rulesets.Pippidon</AssemblyTitle>
     <OutputType>Library</OutputType>
     <PlatformTarget>AnyCPU</PlatformTarget>

global.json

@@ -1,7 +1,7 @@
 {
   "sdk": {
-    "version": "8.0.100",
+    "version": "10.0.100",
     "rollForward": "latestFeature",
     "allowPrerelease": false
   }
-}
+}

osu.Android.props

@@ -17,4 +17,22 @@
          Since Realm objects are not declared directly in Android projects, simply disable Fody. -->
     <DisableFody>true</DisableFody>
   </PropertyGroup>
+  <!-- osu.Framework.Android depends on https://www.nuget.org/packages/Xamarin.AndroidX.Window,
+       which - via a chain of transitive dependencies - also includes https://www.nuget.org/packages/Xamarin.Jetbrains.Annotations,
+       which causes compile failures such as:
+
+         The type 'NotNullAttribute' exists in both 'JetBrains.Annotations, Version=4242.42.42.42, Culture=neutral, PublicKeyToken=1010a0d8d6380325'
+         and 'Xamarin.Jetbrains.Annotations, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' [D:\a\osu\osu\osu.Game.Tests.Android\osu.Game.Tests.Android.csproj]
+
+       We cannot easily change the source files, because of how this project works
+       (all source files are basically symlinked from the desktop test project,
+       so changing anything there just for the sake of mobile would be strange).
+       Thus, apply the following "interesting" workaround as borrowed from https://stackoverflow.com/a/65127159 instead. -->
+  <Target Name="AddPackageAliases" BeforeTargets="FindReferenceAssembliesForReferences;ResolveReferences">
+    <ItemGroup>
+      <ReferencePath Condition="%(Filename) == 'Xamarin.Jetbrains.Annotations'">
+        <Aliases>XamarinJetbrainsAnnotations</Aliases>
+      </ReferencePath>
+    </ItemGroup>
+  </Target>
 </Project>

osu.Android/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="sh.ppy.osulazer" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="34" />
+	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="36" />
 	<application android:allowBackup="true"
 				 android:supportsRtl="true"
 				 android:label="osu!"

osu.Android/osu.Android.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.Android.props" />
   <PropertyGroup>
-    <TargetFramework>net8.0-android</TargetFramework>
+    <TargetFramework>net10.0-android</TargetFramework>
     <OutputType>Exe</OutputType>
     <RootNamespace>osu.Android</RootNamespace>
     <AssemblyName>osu.Android</AssemblyName>

osu.Desktop/osu.Desktop.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <OutputType>WinExe</OutputType>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Description>A free-to-win rhythm game. Rhythm is just a *click* away!</Description>
@@ -27,7 +27,7 @@
     <PackageReference Include="System.IO.Packaging" Version="10.0.9" />
     <!-- Held back due to invite bug in newer versions. See https://github.com/Lachee/discord-rpc-csharp/issues/286 -->
     <PackageReference Include="DiscordRichPresence" Version="1.5.0.51" />
-    <PackageReference Include="Velopack" Version="0.0.1298" />
+    <PackageReference Include="Velopack" Version="1.2.0" />
   </ItemGroup>
   <ItemGroup Label="Resources">
     <EmbeddedResource Include="lazer.ico" />

osu.Game.Benchmarks/osu.Game.Benchmarks.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <IsPackable>false</IsPackable>
   </PropertyGroup>

osu.Game.Rulesets.Catch.Tests.Android/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- using a different name because package name cannot contain 'catch' -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="osu.Game.Rulesets.Catch_Tests.Android" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="34" />
+	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="36" />
 	<application android:allowBackup="true" android:supportsRtl="true" android:label="osu!catch Test" />
 </manifest>

osu.Game.Rulesets.Catch.Tests.Android/osu.Game.Rulesets.Catch.Tests.Android.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.Android.props" />
   <PropertyGroup>
-    <TargetFramework>net8.0-android</TargetFramework>
+    <TargetFramework>net10.0-android</TargetFramework>
     <OutputType>Exe</OutputType>
     <RootNamespace>osu.Game.Rulesets.Catch.Tests</RootNamespace>
     <AssemblyName>osu.Game.Rulesets.Catch.Tests.Android</AssemblyName>

osu.Game.Rulesets.Catch.Tests.iOS/osu.Game.Rulesets.Catch.Tests.iOS.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0-ios</TargetFramework>
+    <TargetFramework>net10.0-ios</TargetFramework>
     <SupportedOSPlatformVersion>13.4</SupportedOSPlatformVersion>
     <RootNamespace>osu.Game.Rulesets.Catch.Tests</RootNamespace>
     <AssemblyName>osu.Game.Rulesets.Catch.Tests.iOS</AssemblyName>

osu.Game.Rulesets.Catch.Tests/osu.Game.Rulesets.Catch.Tests.csproj

@@ -7,7 +7,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Catch\osu.Game.Rulesets.Catch.csproj" />

osu.Game.Rulesets.Catch/osu.Game.Rulesets.Catch.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <OutputType>Library</OutputType>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Description>catch the fruit. to the beat.</Description>

osu.Game.Rulesets.Mania.Tests.Android/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="osu.Game.Rulesets.Mania.Tests.Android" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="34" />
+	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="36" />
 	<application android:allowBackup="true" android:supportsRtl="true" android:label="osu!mania Test" />
-</manifest>
+</manifest>

osu.Game.Rulesets.Mania.Tests.Android/osu.Game.Rulesets.Mania.Tests.Android.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.Android.props" />
   <PropertyGroup>
-    <TargetFramework>net8.0-android</TargetFramework>
+    <TargetFramework>net10.0-android</TargetFramework>
     <OutputType>Exe</OutputType>
     <RootNamespace>osu.Game.Rulesets.Mania.Tests</RootNamespace>
     <AssemblyName>osu.Game.Rulesets.Mania.Tests.Android</AssemblyName>

osu.Game.Rulesets.Mania.Tests.iOS/osu.Game.Rulesets.Mania.Tests.iOS.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0-ios</TargetFramework>
+    <TargetFramework>net10.0-ios</TargetFramework>
     <SupportedOSPlatformVersion>13.4</SupportedOSPlatformVersion>
     <RootNamespace>osu.Game.Rulesets.Mania.Tests</RootNamespace>
     <AssemblyName>osu.Game.Rulesets.Mania.Tests.iOS</AssemblyName>

osu.Game.Rulesets.Mania.Tests/.vscode/launch.json

@@ -7,7 +7,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Debug/net8.0/osu.Game.Rulesets.Mania.Tests.dll"
+                "${workspaceRoot}/bin/Debug/net10.0/osu.Game.Rulesets.Mania.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Debug)",
@@ -20,7 +20,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/bin/Release/net8.0/osu.Game.Rulesets.Mania.Tests.dll"
+                "${workspaceRoot}/bin/Release/net10.0/osu.Game.Rulesets.Mania.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build (Release)",

osu.Game.Rulesets.Mania.Tests/osu.Game.Rulesets.Mania.Tests.csproj

@@ -7,7 +7,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Mania\osu.Game.Rulesets.Mania.csproj" />

osu.Game.Rulesets.Mania/osu.Game.Rulesets.Mania.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <OutputType>Library</OutputType>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Description>smash the keys. to the beat.</Description>

osu.Game.Rulesets.Osu.Tests.Android/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="osu.Game.Rulesets.Osu.Tests.Android" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="34" />
+	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="36" />
 	<application android:allowBackup="true" android:supportsRtl="true" android:label="osu!standard Test" />
-</manifest>
+</manifest>

osu.Game.Rulesets.Osu.Tests.Android/osu.Game.Rulesets.Osu.Tests.Android.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.Android.props" />
   <PropertyGroup>
-    <TargetFramework>net8.0-android</TargetFramework>
+    <TargetFramework>net10.0-android</TargetFramework>
     <OutputType>Exe</OutputType>
     <RootNamespace>osu.Game.Rulesets.Osu.Tests</RootNamespace>
     <AssemblyName>osu.Game.Rulesets.Osu.Tests.Android</AssemblyName>

osu.Game.Rulesets.Osu.Tests.iOS/osu.Game.Rulesets.Osu.Tests.iOS.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0-ios</TargetFramework>
+    <TargetFramework>net10.0-ios</TargetFramework>
     <SupportedOSPlatformVersion>13.4</SupportedOSPlatformVersion>
     <OutputType>Exe</OutputType>
     <RootNamespace>osu.Game.Rulesets.Osu.Tests</RootNamespace>

osu.Game.Rulesets.Osu.Tests/osu.Game.Rulesets.Osu.Tests.csproj

@@ -8,7 +8,7 @@
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Osu\osu.Game.Rulesets.Osu.csproj" />