added sample app for WinUI3

Author: jasonstephen15

GettingStartedGuide/WinUI3_GettingStarted/WinUI_Sample/WinUI_Sample (Package)/Images/LockScreenLogo.scale-200.png

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+<?xml version="1.0" encoding="utf-8"?>
+
+<Package
+  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
+  IgnorableNamespaces="uap rescap">
+
+  <Identity
+    Name="25f0d1c7-2470-49df-b58d-3c2650506b00"
+    Publisher="CN=jasteph"
+    Version="1.0.0.0" />
+
+  <Properties>
+    <DisplayName>WinUI_Sample (Package)</DisplayName>
+    <PublisherDisplayName>jasteph</PublisherDisplayName>
+    <Logo>Images\StoreLogo.png</Logo>
+  </Properties>
+
+  <Dependencies>
+    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />
+    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.14393.0" MaxVersionTested="10.0.14393.0" />
+  </Dependencies>
+
+  <Resources>
+    <Resource Language="x-generate"/>
+  </Resources>
+
+  <Applications>
+    <Application Id="App"
+      Executable="$targetnametoken$.exe"
+      EntryPoint="$targetentrypoint$">
+      <uap:VisualElements
+        DisplayName="WinUI_Sample (Package)"
+        Description="WinUI_Sample (Package)"
+        BackgroundColor="transparent"
+        Square150x150Logo="Images\Square150x150Logo.png"
+        Square44x44Logo="Images\Square44x44Logo.png">
+        <uap:DefaultTile Wide310x150Logo="Images\Wide310x150Logo.png" />
+        <uap:SplashScreen Image="Images\SplashScreen.png" />
+      </uap:VisualElements>
+    </Application>
+  </Applications>
+
+  <Capabilities>
+    <Capability Name="internetClient" />
+    <rescap:Capability Name="runFullTrust" />
+  </Capabilities>
+</Package>

GettingStartedGuide/WinUI3_GettingStarted/WinUI_Sample/WinUI_Sample (Package)/Images/SplashScreen.scale-200.png

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '15.0'">
+    <VisualStudioVersion>15.0</VisualStudioVersion>
+  </PropertyGroup>
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|x86">
+      <Configuration>Debug</Configuration>
+      <Platform>x86</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x86">
+      <Configuration>Release</Configuration>
+      <Platform>x86</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup>
+    <WapProjPath Condition="'$(WapProjPath)'==''">$(MSBuildExtensionsPath)\Microsoft\DesktopBridge\</WapProjPath>
+    <PathToXAMLWinRTImplementations>WinUI_Sample\</PathToXAMLWinRTImplementations>
+  </PropertyGroup>
+  <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.props" />
+  <PropertyGroup>
+    <ProjectGuid>b820339b-bf7d-4f43-826d-d1a82a763178</ProjectGuid>
+    <TargetPlatformVersion>10.0.18362.0</TargetPlatformVersion>
+    <TargetPlatformMinVersion>10.0.17134.0</TargetPlatformMinVersion>
+    <DefaultLanguage>en-US</DefaultLanguage>
+    <AppxPackageSigningEnabled>false</AppxPackageSigningEnabled>
+    <EntryPointProjectUniqueName>..\WinUI_Sample\WinUI_Sample.csproj</EntryPointProjectUniqueName>
+  </PropertyGroup>
+  <ItemGroup>
+    <AppxManifest Include="Package.appxmanifest">
+      <SubType>Designer</SubType>
+    </AppxManifest>
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="Images\SplashScreen.scale-200.png" />
+    <Content Include="Images\LockScreenLogo.scale-200.png" />
+    <Content Include="Images\Square150x150Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.targetsize-24_altform-unplated.png" />
+    <Content Include="Images\StoreLogo.png" />
+    <Content Include="Images\Wide310x150Logo.scale-200.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\WinUI_Sample\WinUI_Sample.csproj">
+      <SkipGetTargetFrameworkProperties>True</SkipGetTargetFrameworkProperties>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <SDKReference Include="Microsoft.VCLibs.Desktop, Version=14.0" />
+    <!-- Needed for ucrtbased.dll when running a debug build. -->
+    <SDKReference Include="Microsoft.VCLibs, Version=14.0" Condition="'$(Configuration)' == 'Debug'" />
+  </ItemGroup>
+  <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.targets" />
+  <Import Project="build\Microsoft.WinUI.AppX.targets" />
+</Project>

GettingStartedGuide/WinUI3_GettingStarted/WinUI_Sample/WinUI_Sample (Package)/Images/Square150x150Logo.scale-200.png

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup />
+</Project>