Add UseWinUI property (#897) (#902)

Author: huichen123

dev/VSIX/ProjectTemplates/Desktop/CSharp/ClassLibrary/ProjectTemplate.csproj

@@ -4,6 +4,7 @@
     <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
     <RootNamespace>$safeprojectname$</RootNamespace>
     <RuntimeIdentifiers>win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
 
   <ItemGroup>

dev/VSIX/ProjectTemplates/Desktop/CSharp/PackagedApp/BlankApp/ProjectTemplate.csproj

@@ -7,6 +7,7 @@
     <ApplicationManifest>app.manifest</ApplicationManifest>
     <Platforms>x86;x64;arm64</Platforms>
     <RuntimeIdentifiers>win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
 
   <ItemGroup>

dev/VSIX/ProjectTemplates/Desktop/CppWinRT/PackagedApp/BlankApp/ProjectTemplate.vcxproj

@@ -20,6 +20,7 @@
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
     <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17763.0</WindowsTargetPlatformMinVersion>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <ItemGroup Label="ProjectConfigurations">

dev/VSIX/ProjectTemplates/Neutral/CppWinRT/RuntimeComponent/ProjectTemplate.vcxproj

@@ -15,6 +15,7 @@
     <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">$targetplatformversion$</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>$targetplatformminversion$</WindowsTargetPlatformMinVersion>
     <DesktopCompatible>true</DesktopCompatible>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <ItemGroup Label="ProjectConfigurations">

dev/VSIX/ProjectTemplates/UWP/CSharp/BlankApp/ProjectTemplate.csproj

@@ -17,6 +17,7 @@
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <WindowsXamlEnableOverview>true</WindowsXamlEnableOverview>
+    <UseWinUI>true</UseWinUI>
     $if$($includeKeyFile$==true)
     <PackageCertificateKeyFile>$projectname$_TemporaryKey.pfx</PackageCertificateKeyFile>
     $endif$

dev/VSIX/ProjectTemplates/UWP/CSharp/ClassLibrary/ProjectTemplate.csproj

@@ -16,6 +16,7 @@
     <MinimumVisualStudioVersion>16</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>

dev/VSIX/ProjectTemplates/UWP/CSharp/RuntimeComponent/ProjectTemplate.csproj

@@ -17,6 +17,7 @@
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <AllowCrossPlatformRetargeting>false</AllowCrossPlatformRetargeting>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
     <PlatformTarget>x86</PlatformTarget>

dev/VSIX/ProjectTemplates/UWP/CppWinRT/BlankApp/ProjectTemplate.vcxproj

@@ -14,6 +14,7 @@
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
     <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">$targetplatformversion$</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>$targetplatformminversion$</WindowsTargetPlatformMinVersion>
+    <UseWinUI>true</UseWinUI>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <ItemGroup Label="ProjectConfigurations">