Update TFM from .NET 8 to .NET 9 (#8301)

* Update TFM from .NET 8 to .NET 9

* Updating global.json

Directory.Build.props

@@ -2,8 +2,8 @@
   <PropertyGroup>
     <RepositoryName>wpf</RepositoryName>
     <WindowsDesktopARM64Support>true</WindowsDesktopARM64Support>
-    <TargetFramework>net8.0</TargetFramework>
-    <TargetFrameworkVersion>8.0</TargetFrameworkVersion>
+    <TargetFramework>net9.0</TargetFramework>
+    <TargetFrameworkVersion>9.0</TargetFrameworkVersion>
   </PropertyGroup>
   <!-- Normalize $(TestWpfArcadeSdkPath) by appending a '\' to it if one is missing -->
   <PropertyGroup Condition="'$(TestWpfArcadeSdkPath)'!=''">

eng/WpfArcadeSdk/tools/SdkReferences.targets

@@ -202,10 +202,10 @@
                  Condition="Exists('$(PkgMicrosoft_Private_Winforms)\ref\$(TargetFramework)\%(MicrosoftPrivateWinFormsReference.Identity).dll')">
         <NuGetPackageId>Microsoft.Private.Winforms</NuGetPackageId>
       </Reference>
-      <Reference Include="$(PkgMicrosoft_Private_Winforms)\ref\net7.0\%(MicrosoftPrivateWinFormsReference.Identity).dll"
+      <Reference Include="$(PkgMicrosoft_Private_Winforms)\ref\net8.0\%(MicrosoftPrivateWinFormsReference.Identity).dll"
                  Condition="!Exists('$(PkgMicrosoft_Private_Winforms)\ref\$(TargetFramework)\%(MicrosoftPrivateWinFormsReference.Identity).dll')
-                 And $(TargetFramework) == 'net8.0'
-                 And Exists('$(PkgMicrosoft_Private_Winforms)\ref\net7.0\%(MicrosoftPrivateWinFormsReference.Identity).dll')">
+                 And $(TargetFramework) == 'net9.0'
+                 And Exists('$(PkgMicrosoft_Private_Winforms)\ref\net8.0\%(MicrosoftPrivateWinFormsReference.Identity).dll')">
         <NuGetPackageId>Microsoft.Private.Winforms</NuGetPackageId>
       </Reference>
     </ItemGroup>

global.json

@@ -1,6 +1,6 @@
 {
   "tools": {
-    "dotnet": "9.0.100-alpha.1.23464.17",
+    "dotnet": "9.0.100-alpha.1.23511.2",
     "runtimes": {
       "dotnet": [
         "2.1.7",
@@ -16,7 +16,7 @@
     "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.23504.4"
   },
   "sdk": {
-    "version": "9.0.100-alpha.1.23464.17"
+    "version": "9.0.100-alpha.1.23511.2"
   },
   "native-tools": {
     "strawberry-perl": "5.38.0.1",

src/Microsoft.DotNet.Wpf/src/PresentationBuildTasks/PresentationBuildTasks.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net472;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net9.0</TargetFrameworks>
     <EnableDefaultItems>false</EnableDefaultItems>
     <EnablePInvokeAnalyzer>true</EnablePInvokeAnalyzer>
 
@@ -60,7 +60,7 @@
     <PackagingAssemblyContent Include="System.Reflection.MetadataLoadContext.dll" />
     <PackagingAssemblyContent Include="System.Runtime.CompilerServices.Unsafe.dll" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetFramework)'=='net8.0'">
+  <ItemGroup Condition="'$(TargetFramework)'=='net9.0'">
     <PackagingAssemblyContent Include="PresentationBuildTasks.dll" />
     <PackagingAssemblyContent Include="System.Reflection.MetadataLoadContext.dll" />
   </ItemGroup>