Upgrade Microsoft.Xaml.Behaviors.WinUI.Managed to latest version, remove support for out-of-support net6.0-windows* and net7.0-windows* TFMs.

Author: Arlodotexe

MultiTarget/AvailableTargetFrameworks.props

@@ -3,7 +3,7 @@
         <!-- See https://github.com/CommunityToolkit/Tooling-Windows-Submodule/pull/235#issuecomment-2530131559 -->
         <UwpTargetFramework Condition="'$(UwpTargetFramework)' == '' AND '$(BuildingInsideVisualStudio)' == 'true'">uap10.0.17763;</UwpTargetFramework>
         <UwpTargetFramework Condition="'$(UwpTargetFramework)' == '' AND '$(BuildingInsideVisualStudio)' != 'true'">uap10.0.17763;net8.0-windows10.0.26100.0;</UwpTargetFramework>
-        <WinAppSdkTargetFramework Condition="'$(WinAppSdkTargetFramework)' == ''">net9.0-windows10.0.19041.0;net8.0-windows10.0.19041.0;net7.0-windows10.0.19041.0;net6.0-windows10.0.19041.0;</WinAppSdkTargetFramework>
+        <WinAppSdkTargetFramework Condition="'$(WinAppSdkTargetFramework)' == ''">net9.0-windows10.0.19041.0;net8.0-windows10.0.19041.0;</WinAppSdkTargetFramework>
 
         <WasmHeadTargetFramework Condition="'$(WasmHeadTargetFramework)' == ''">net9.0;</WasmHeadTargetFramework>
         <LinuxHeadTargetFramework Condition="'$(LinuxHeadTargetFramework)' == ''">net9.0;</LinuxHeadTargetFramework>

MultiTarget/EnabledTargetFrameworks.props

@@ -3,8 +3,8 @@
         <!-- See https://github.com/CommunityToolkit/Tooling-Windows-Submodule/pull/235#issuecomment-2530131559 -->
         <UwpTargetFramework Condition="'$(UwpTargetFramework)' == '' AND '$(BuildingInsideVisualStudio)' == 'true'">uap10.0.17763;</UwpTargetFramework>
         <UwpTargetFramework Condition="'$(UwpTargetFramework)' == '' AND '$(BuildingInsideVisualStudio)' != 'true'">uap10.0.17763;net8.0-windows10.0.26100.0;</UwpTargetFramework>
-        <WinAppSdkTargetFramework Condition="'$(WinAppSdkTargetFramework)' == ''">net9.0-windows10.0.19041.0;net8.0-windows10.0.19041.0;net7.0-windows10.0.19041.0;net6.0-windows10.0.19041.0;</WinAppSdkTargetFramework>
-        
+        <WinAppSdkTargetFramework Condition="'$(WinAppSdkTargetFramework)' == ''">net9.0-windows10.0.19041.0;net8.0-windows10.0.19041.0;</WinAppSdkTargetFramework>        
+
         <WasmHeadTargetFramework Condition="'$(WasmHeadTargetFramework)' == ''">net9.0;</WasmHeadTargetFramework>
         <LinuxHeadTargetFramework Condition="'$(LinuxHeadTargetFramework)' == ''">net9.0;</LinuxHeadTargetFramework>
         <WpfHeadTargetFramework Condition="'$(WpfHeadTargetFramework)' == ''">net9.0;</WpfHeadTargetFramework>

ProjectHeads/App.Head.WinAppSdk.Dependencies.props

@@ -3,6 +3,6 @@
 <Project>
   <ItemGroup>
     <PackageReference Include="CommunityToolkit.WinUI.UI.Controls.Markdown" Version="7.1.2" />
-    <PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.0.9" />
+    <PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="3.0.0-preview1" />
   </ItemGroup>
 </Project>