Update to .NET 9

.editorconfig

@@ -135,4 +135,7 @@ dotnet_diagnostic.CA2208.severity = error
 dotnet_diagnostic.CA1834.severity = error
 
 # IDE0220: Add explicit cast
-dotnet_diagnostic.IDE0220.severity = error
+dotnet_diagnostic.IDE0220.severity = error
+
+# IDE0220: The field [ObservableProperty] can be converted to a partial property
+dotnet_diagnostic.MVMTK0042.severity = error

Directory.Build.props

@@ -1,25 +1,34 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Project>
   <PropertyGroup>
-    <NetVersion>net8.0</NetVersion>
-    <MauiPackageVersion>8.0.93</MauiPackageVersion>
+    <NetVersion>net9.0</NetVersion>
+    <MauiPackageVersion>9.0.0</MauiPackageVersion>
     <MauiCommunityToolkitPackageVersion>9.1.1</MauiCommunityToolkitPackageVersion>
-    <LangVersion>latest</LangVersion>
+    <LangVersion>preview</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <NoWarn>NETSDK1023</NoWarn>
-    <SkipValidateMauiImplicitPackageReferences>true</SkipValidateMauiImplicitPackageReferences>
     <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
     <GenerateErrorForMissingTargetingPacks>false</GenerateErrorForMissingTargetingPacks>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
     <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>
 
-    <!-- https://learn.microsoft.com/dotnet/core/deploying/native-aot/?tabs=net8plus%2Cwindows -->
+    <!-- Support NativeAOT https://learn.microsoft.com/dotnet/core/deploying/native-aot/?tabs=net8plus%2Cwindows -->
     <StripSymbols>false</StripSymbols>
     <TrimmerSingleWarn>false</TrimmerSingleWarn>
 
+    <!-- Prevent NuGet Package Vulnerabilities -->
+    <NuGetAudit>enable</NuGetAudit>
+    <NuGetAuditMode>all</NuGetAuditMode>
+
+    <!-- MAUI Specific -->
+    <MauiStrictXamlCompilation>true</MauiStrictXamlCompilation>
+    <SkipValidateMauiImplicitPackageReferences>true</SkipValidateMauiImplicitPackageReferences>
+    <MauiEnableXamlCBindingWithSourceCompilation>true</MauiEnableXamlCBindingWithSourceCompilation>
+
     <!-- WarningsAsErrors
      CS0419: Ambiguous reference in cref attribute 
+     CS0618: Is obsolete
      CS1570: XML comment has badly formed XML 'Expected an end tag for element [parameter] 
      CS1571: XML comment on [construct] has a duplicate param tag for [parameter] 
      CS1572: XML comment has a param tag for '[parameter]', but there is no parameter by that name 
@@ -39,13 +48,28 @@
      CS1711: XML comment has a typeparam tag, but there is no type parameter by that name 
      CS1712: Type parameter has no matching typeparam tag in the XML comment
      CS1723: XML comment has cref attribute that refers to a type parameter
-     CS1734: XML comment has a paramref tag, but there is no parameter by that name 
+     CS1734: XML comment has a paramref tag, but there is no parameter by that name
+     MVMTK0042: The field [ObservableProperty] can be converted to a partial property
+     CsWinRT1028: Class implements WinRT interfaces but isn't marked partial
+     CsWinRT1030: Class implements WinRT interfaces that require unsafe code
+     XC0045: Binding: Property not found
+     XC0103: Consider attributing the markup extension with [RequireService] or [AcceptEmptyServiceProvider] if it doesn't require any
+     NU1900	Error communicating with package source, while getting vulnerability information.
+     NU1901	Package with low severity detected
+     NU1902	Package with moderate severity detected
+     NU1903	Package with high severity detected
+     NU1904	Package with critical severity detected
+     NU1905	An audit source does not provide a vulnerability database
      NUnit*: NUnit Analyzers 
      IL2***: Trim Warnings
      IL3***: AOT Warnings-->
     <WarningsAsErrors>
       nullable,
-      CS0419,CS1570,CS1571,CS1572,CS1573,CS1574,CS1580,CS1581,CS1584,CS1587,CS1589,CS1590,CS1591,CS1592,CS1598,CS1658,CS1710,CS1711,CS1712,CS1723,CS1734,
+      CS0419,CS0618,CS1570,CS1571,CS1572,CS1573,CS1574,CS1580,CS1581,CS1584,CS1587,CS1589,CS1590,CS1591,CS1592,CS1598,CS1658,CS1710,CS1711,CS1712,CS1723,CS1734,
+      MVMTK0042,
+      CsWinRT1028,CsWinRT1030,
+      XC0045,XC0103,
+      NU1900,NU1901,NU1902,NU1903,NU1904,NU1905,
       NUnit1001,NUnit1002,NUnit1003,NUnit1004,NUnit1005,NUnit1006,NUnit1007,NUnit1008,NUnit1009,NUnit1010,NUnit1011,NUnit1012,NUnit1013,NUnit1014,NUnit1015,NUnit1016,NUnit1017,NUnit1018,NUnit1019,NUnit1020,NUnit1021,NUnit1022,NUnit1023,NUnit1024,NUnit1025,NUnit1026,NUnit1027,NUnit1028,NUnit1029,NUnit1030,NUnit1031,NUnit1032,NUnit1033,
       NUnit2001,NUnit2002,NUnit2003,NUnit2004,NUnit2005,NUnit2006,NUnit2007,NUnit2008,NUnit2009,NUnit2010,NUnit2011,NUnit2012,NUnit2013,NUnit2014,NUnit2015,NUnit2016,NUnit2017,NUnit2018,NUnit2019,NUnit2020,NUnit2021,NUnit2022,NUnit2023,NUnit2024,NUnit2025,NUnit2026,NUnit2027,NUnit2028,NUnit2029,NUnit2030,NUnit2031,NUnit2032,NUnit2033,NUnit2034,NUnit2035,NUnit2036,NUnit2037,NUnit2038,NUnit2039,NUnit2040,NUnit2041,NUnit2042,NUnit2043,NUnit2044,NUnit2045,NUnit2046,NUnit2047,NUnit2048,NUnit2049,NUnit2050,
       NUnit3001,NUnit3002,NUnit3003,NUnit3004,
@@ -64,7 +88,7 @@
       IL2110,IL2111,IL2112,IL2113,IL2114,IL2115,IL2116,IL2117,IL2118,IL2119,
       IL2120,IL2121,IL2122,
       IL3050,IL3051,IL3052,IL3053,IL3054,IL3055,IL3056
-      </WarningsAsErrors>
+    </WarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>

azure-pipelines.yml

@@ -3,7 +3,7 @@ variables:
   PreviewNumber: $[counter(variables['CurrentSemanticVersionBase'], 1001)]
   CurrentSemanticVersion: '$(CurrentSemanticVersionBase)-preview$(PreviewNumber)'
   NugetPackageVersion: '$(CurrentSemanticVersion)'
-  NET_VERSION: '8.0.x'
+  NET_VERSION: '9.0.100'
   RunPoliCheck: false
   PathToLibrarySolution: 'src/CommunityToolkit.Maui.Markup.sln'
   PathToSamplesSolution: 'samples/CommunityToolkit.Maui.Markup.Sample.sln'
@@ -51,13 +51,14 @@ jobs:
         'Windows':
           image: 'windows-latest'
         'macOS':
-          image: 'macos-14'
+          image: 'macos-15'
     pool:
       vmImage: $(image)
     steps:
       - script: |
-          sudo xcode-select -s /Applications/Xcode_$(CommunityToolkitSampleApp_Xcode_Version).app 
-          sudo xcode-select -p
+          echo Installed Xcode Versions:
+          ls -al  /Applications | grep Xcode
+          echo '##vso[task.setvariable variable=MD_APPLE_SDK_ROOT;]'/Applications/Xcode_$(CommunityToolkitSampleApp_Xcode_Version).app;sudo xcode-select --switch /Applications/Xcode_$(CommunityToolkitSampleApp_Xcode_Version).app/Contents/Developer
         displayName: 'Set Xcode v$(CommunityToolkitSampleApp_Xcode_Version)'
         condition: eq(variables['Agent.OS'], 'Darwin') # Only run this step on macOS
 
@@ -68,10 +69,19 @@ jobs:
           version: '$(NET_VERSION)'
           includePreviewVersions: false
 
+      - task: JavaToolInstaller@0
+        displayName: "Install Java"
+        inputs:
+          versionSpec: "17"
+          jdkArchitectureOption: "x64"
+          jdkSourceOption: "PreInstalled"
+
       - task: CmdLine@2
         displayName: 'Install .NET MAUI Workload'
         inputs:
-          script : 'dotnet workload install maui'
+          script : |
+            dotnet workload install maui
+            dotnet workload update
 
       - pwsh: |
           Invoke-WebRequest 'https://raw.githubusercontent.com/Samsung/Tizen.NET/main/workload/scripts/workload-install.ps1' -OutFile 'workload-install.ps1'
@@ -98,7 +108,7 @@ jobs:
         'Windows':
           image: 'windows-latest'
         'macOS':
-          image: 'macos-14'
+          image: 'macos-15'
     pool:
       vmImage: $(image)
     steps:
@@ -123,8 +133,9 @@ jobs:
         condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'), eq(variables['build.reason'], 'PullRequest'))
 
       - script: |
-          sudo xcode-select -s /Applications/Xcode_$(CommunityToolkitLibrary_Xcode_Version).app 
-          sudo xcode-select -p
+          echo Installed Xcode Versions:
+          ls -al  /Applications | grep Xcode
+          echo '##vso[task.setvariable variable=MD_APPLE_SDK_ROOT;]'/Applications/Xcode_$(CommunityToolkitLibrary_Xcode_Version).app;sudo xcode-select --switch /Applications/Xcode_$(CommunityToolkitLibrary_Xcode_Version).app/Contents/Developer
         displayName: 'Set Xcode v$(CommunityToolkitLibrary_Xcode_Version)'
         condition: eq(variables['Agent.OS'], 'Darwin') # Only run this step on macOS
 
@@ -135,10 +146,19 @@ jobs:
           version: '$(NET_VERSION)'
           includePreviewVersions: false
 
+      - task: JavaToolInstaller@0
+        displayName: "Install Java"
+        inputs:
+          versionSpec: "17"
+          jdkArchitectureOption: "x64"
+          jdkSourceOption: "PreInstalled"
+
       - task: CmdLine@2
         displayName: 'Install .NET MAUI Workload'
         inputs:
-          script : 'dotnet workload install maui'
+          script : |
+            dotnet workload install maui
+            dotnet workload update
 
       - pwsh: |
           Invoke-WebRequest 'https://raw.githubusercontent.com/Samsung/Tizen.NET/main/workload/scripts/workload-install.ps1' -OutFile 'workload-install.ps1'
@@ -249,13 +269,14 @@ jobs:
         'Windows':
           image: 'windows-latest'
         'macOS':
-          image: 'macos-14'
+          image: 'macos-15'
     pool:
       vmImage: $(image)
     steps:
       - script: |
-          sudo xcode-select -s /Applications/Xcode_$(CommunityToolkitLibrary_Xcode_Version).app 
-          sudo xcode-select -p
+          echo Installed Xcode Versions:
+          ls -al  /Applications | grep Xcode
+          echo '##vso[task.setvariable variable=MD_APPLE_SDK_ROOT;]'/Applications/Xcode_$(CommunityToolkitLibrary_Xcode_Version).app;sudo xcode-select --switch /Applications/Xcode_$(CommunityToolkitLibrary_Xcode_Version).app/Contents/Developer
         displayName: 'Set Xcode v$(CommunityToolkitLibrary_Xcode_Version)'
         condition: eq(variables['Agent.OS'], 'Darwin') # Only run this step on macOS
 

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.203",
+    "version": "9.0.0",
     "rollForward": "latestFeature",
     "allowPrerelease": false
   }

samples/CommunityToolkit.Maui.Markup.Sample/App.cs

@@ -1,11 +1,14 @@
 namespace CommunityToolkit.Maui.Markup.Sample;
 
-class App : Application
+partial class App : Application
 {
+	readonly AppShell appShell;
+
 	public App(AppShell shell)
 	{
 		Resources = new AppStyles();
-
-		MainPage = shell;
+		appShell = shell;
 	}
+
+	protected override Window CreateWindow(IActivationState? activationState) => new(appShell);
 }

samples/CommunityToolkit.Maui.Markup.Sample/AppShell.cs

@@ -2,7 +2,7 @@
 
 namespace CommunityToolkit.Maui.Markup.Sample;
 
-class AppShell : Shell
+partial class AppShell : Shell
 {
 	static readonly IReadOnlyDictionary<Type, string> pageRouteMappingDictionary = new Dictionary<Type, string>(
 	[
@@ -32,7 +32,7 @@ public static string GetRoute(Type type)
 		return route;
 	}
 
-	static KeyValuePair<Type, string> CreateRoutePageMapping<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] TPage, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] TViewModel>() where TPage : BaseContentPage<TViewModel>
+	static KeyValuePair<Type, string> CreateRoutePageMapping<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TPage, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TViewModel>() where TPage : BaseContentPage<TViewModel>
 																					where TViewModel : BaseViewModel
 	{
 		var route = CreateRoute();

samples/CommunityToolkit.Maui.Markup.Sample/CommunityToolkit.Maui.Markup.Sample.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>$(NetVersion)-android;$(NetVersion)-ios;$(NetVersion)-maccatalyst</TargetFrameworks>
@@ -22,20 +22,23 @@
     <ApplicationVersion>1</ApplicationVersion>
 
     <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
-    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">14.2</SupportedOSPlatformVersion>
-    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">14.0</SupportedOSPlatformVersion>
+    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">15.0</SupportedOSPlatformVersion>
+    <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">15.0</SupportedOSPlatformVersion>
     <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
     <SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
     <TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
+
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <WindowsSdkPackageVersion>10.0.19041.41</WindowsSdkPackageVersion>
+
+    <!-- Remove this NoWarn once .NET MAUI has implemented partial classes for XamlUserTypeInfo source generators -->
+    <NoWarn>CsWinRT1028</NoWarn>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(Configuration)' == 'Release' 
-                  AND $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'tizen'
-                  AND $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'android'
-                  AND $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'windows'">
+  <PropertyGroup Condition="'$(Configuration)' == 'Release' &#xD;&#xA;                  AND $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'tizen'&#xD;&#xA;                  AND $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'android'&#xD;&#xA;                  AND $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'windows'">
     <!-- Ahead-of-time compilation is not yet supported net8.0-tizen -->
     <!-- Cross-OS native compilation is not supported net8.0-android -->
-    <!-- net8.0-windows causing build errors in azurepipelines.yml -->
+    <!-- Windows causing build errors in azurepipelines.yml -->
     <PublishAot>true</PublishAot>
   </PropertyGroup>
 
@@ -52,14 +55,14 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiPackageVersion)"/>
-    <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiPackageVersion)"/>
+    <PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiPackageVersion)" />
+    <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiPackageVersion)" />
     <PackageReference Include="CommunityToolkit.Maui" Version="$(MauiCommunityToolkitPackageVersion)" />
-    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.3.2" />
-    <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="8.10.0" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0-preview1" />
+    <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="9.0.0" />
     <PackageReference Include="Refit.HttpClientFactory" Version="8.0.0" />
   </ItemGroup>
-
+  
   <ItemGroup>
     <ProjectReference Include="..\..\src\CommunityToolkit.Maui.Markup\CommunityToolkit.Maui.Markup.csproj" />
     <ProjectReference Include="..\..\src\CommunityToolkit.Maui.Markup.SourceGenerators\CommunityToolkit.Maui.Markup.SourceGenerators.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
@@ -68,10 +71,7 @@
   <!-- Workaround for https://github.com/dotnet/maui/issues/7272 -->
   <Target Name="_SetPublishFolderTypeNoneOnDocFileItems" BeforeTargets="_ComputePublishLocation">
     <ItemGroup>
-      <ResolvedFileToPublish
-        Update="@(ResolvedFileToPublish)"
-        Condition="'%(ResolvedFileToPublish.Extension)' == '.xml' And '%(ResolvedFileToPublish.PublishFolderType)' == ''"
-        PublishFolderType="None" />
+      <ResolvedFileToPublish Update="@(ResolvedFileToPublish)" Condition="'%(ResolvedFileToPublish.Extension)' == '.xml' And '%(ResolvedFileToPublish.PublishFolderType)' == ''" PublishFolderType="None" />
     </ItemGroup>
   </Target>
 

samples/CommunityToolkit.Maui.Markup.Sample/MauiProgram.cs

@@ -8,12 +8,17 @@ public class MauiProgram
 	public static MauiApp CreateMauiApp()
 	{
 		var builder = MauiApp.CreateBuilder()
-								.UseMauiApp<App>()
-								.UseMauiCommunityToolkit()
-								.UseMauiCommunityToolkitMarkup();
-
-		// Fonts
-		builder.ConfigureFonts(fonts => fonts.AddFont("FontAwesome.otf", "FontAwesome"));
+			.UseMauiApp<App>()
+			.UseMauiCommunityToolkit()
+			.UseMauiCommunityToolkitMarkup()
+			.ConfigureFonts(fonts => fonts.AddFont("FontAwesome.otf", "FontAwesome"))
+			.ConfigureMauiHandlers(handlers =>
+			{
+#if IOS || MACCATALYST
+				handlers.AddHandler<CollectionView, Microsoft.Maui.Controls.Handlers.Items2.CollectionViewHandler2>();
+				handlers.AddHandler<CarouselView, Microsoft.Maui.Controls.Handlers.Items2.CarouselViewHandler2>();
+#endif
+			});
 
 		// App Shell
 		builder.Services.AddTransient<AppShell>();
@@ -25,8 +30,8 @@ public static MauiApp CreateMauiApp()
 		builder.Services.AddSingleton(Preferences.Default);
 		builder.Services.AddSingleton<HackerNewsAPIService>();
 		builder.Services.AddRefitClient<IHackerNewsApi>()
-							.ConfigureHttpClient(client => client.BaseAddress = new Uri("https://hacker-news.firebaseio.com/v0"))
-							.AddStandardResilienceHandler(options => options.Retry = new MobileHttpRetryStrategyOptions());
+			.ConfigureHttpClient(client => client.BaseAddress = new Uri("https://hacker-news.firebaseio.com/v0"))
+			.AddStandardResilienceHandler(options => options.Retry = new MobileHttpRetryStrategyOptions());
 
 		// Pages + View Models
 		builder.Services.AddTransient<NewsPage, NewsViewModel>();

samples/CommunityToolkit.Maui.Markup.Sample/Pages/NewsDetailPage.cs

@@ -1,7 +1,7 @@
 using Microsoft.Maui.Layouts;
 namespace CommunityToolkit.Maui.Markup.Sample.Pages;
 
-sealed class NewsDetailPage : BaseContentPage<NewsDetailViewModel>
+sealed partial class NewsDetailPage : BaseContentPage<NewsDetailViewModel>
 {
 	public NewsDetailPage(NewsDetailViewModel newsDetailViewModel) : base(newsDetailViewModel, newsDetailViewModel.Title)
 	{

samples/CommunityToolkit.Maui.Markup.Sample/Pages/NewsPage.cs

@@ -1,6 +1,6 @@
 namespace CommunityToolkit.Maui.Markup.Sample.Pages;
 
-sealed class NewsPage : BaseContentPage<NewsViewModel>
+sealed partial class NewsPage : BaseContentPage<NewsViewModel>
 {
 	readonly IDispatcher dispatcher;
 	readonly RefreshView refreshView;