MicrosoftEdge · jasonstephen15 · Jun 11, 2021
diff --git a/...ingStarted/ProjectReunion_DemoApp (Package)/Images/LockScreenLogo.scale-200.png b/...ingStarted/ProjectReunion_DemoApp (Package)/Images/LockScreenLogo.scale-200.png
diff --git a/...ttingStarted/ProjectReunion_DemoApp (Package)/Images/SplashScreen.scale-200.png b/...ttingStarted/ProjectReunion_DemoApp (Package)/Images/SplashScreen.scale-200.png
diff --git a/...Started/ProjectReunion_DemoApp (Package)/Images/Square150x150Logo.scale-200.png b/...Started/ProjectReunion_DemoApp (Package)/Images/Square150x150Logo.scale-200.png
diff --git a/...ngStarted/ProjectReunion_DemoApp (Package)/Images/Square44x44Logo.scale-200.png b/...ngStarted/ProjectReunion_DemoApp (Package)/Images/Square44x44Logo.scale-200.png
diff --git a/...ion_DemoApp (Package)/Images/Square44x44Logo.targetsize-24_altform-unplated.png b/...ion_DemoApp (Package)/Images/Square44x44Logo.targetsize-24_altform-unplated.png
diff --git a/...ectReunion_GettingStarted/ProjectReunion_DemoApp (Package)/Images/StoreLogo.png b/...ectReunion_GettingStarted/ProjectReunion_DemoApp (Package)/Images/StoreLogo.png
diff --git a/...ngStarted/ProjectReunion_DemoApp (Package)/Images/Wide310x150Logo.scale-200.png b/...ngStarted/ProjectReunion_DemoApp (Package)/Images/Wide310x150Logo.scale-200.png
diff --git a/...inUI3_ProjectReunion_GettingStarted/ProjectReunion_DemoApp (Package)/Package.appxmanifest b/...inUI3_ProjectReunion_GettingStarted/ProjectReunion_DemoApp (Package)/Package.appxmanifest
@@ -0,0 +1,49 @@
+<?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="7f4adcd6-e37a-4d8a-81af-5f17f37f86e2"
+    Publisher="CN=jasteph"
+    Version="1.0.0.0" />
+
+  <Properties>
+    <DisplayName>ProjectReunion_DemoApp (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="ProjectReunion_DemoApp (Package)"
+        Description="ProjectReunion_DemoApp (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>
diff --git a/...ingStarted/ProjectReunion_DemoApp (Package)/ProjectReunion_DemoApp (Package).assets.cache b/...ingStarted/ProjectReunion_DemoApp (Package)/ProjectReunion_DemoApp (Package).assets.cache
diff --git a/..._GettingStarted/ProjectReunion_DemoApp (Package)/ProjectReunion_DemoApp (Package).wapproj b/..._GettingStarted/ProjectReunion_DemoApp (Package)/ProjectReunion_DemoApp (Package).wapproj
@@ -0,0 +1,68 @@
+<?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>
+    <ProjectConfiguration Include="Debug|arm64">
+      <Configuration>Debug</Configuration>
+      <Platform>arm64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|arm64">
+      <Configuration>Release</Configuration>
+      <Platform>arm64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup>
+    <WapProjPath Condition="'$(WapProjPath)'==''">$(MSBuildExtensionsPath)\Microsoft\DesktopBridge\</WapProjPath>
+    <PathToXAMLWinRTImplementations>ProjectReunion_DemoApp\</PathToXAMLWinRTImplementations>
+  </PropertyGroup>
+  <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.props" />
+  <PropertyGroup>
+    <ProjectGuid>7efcce03-487f-44bd-9bd5-ca60be463f15</ProjectGuid>
+    <TargetPlatformVersion>10.0.19041.0</TargetPlatformVersion>
+    <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
+    <DefaultLanguage>en-US</DefaultLanguage>
+    <AppxPackageSigningEnabled>false</AppxPackageSigningEnabled>
+    <AppxTargetsLocation Condition="'$(AppxTargetsLocation)'==''">$(MSBuildThisFileDirectory)build\</AppxTargetsLocation>
+    <EntryPointProjectUniqueName>..\ProjectReunion_DemoApp\ProjectReunion_DemoApp.csproj</EntryPointProjectUniqueName>
+  </PropertyGroup>
+  <ItemGroup>
+    <AppxManifest Include="Package.appxmanifest">
+      <SubType>Designer</SubType>
+    </AppxManifest>
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="Images\SplashScreen.scale-200.png" />
+    <Content Include="Images\LockScreenLogo.scale-200.png" />
+    <Content Include="Images\Square150x150Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.targetsize-24_altform-unplated.png" />
+    <Content Include="Images\StoreLogo.png" />
+    <Content Include="Images\Wide310x150Logo.scale-200.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\ProjectReunion_DemoApp\ProjectReunion_DemoApp.csproj">
+      <SkipGetTargetFrameworkProperties>True</SkipGetTargetFrameworkProperties>
+      <PublishProfile>Properties\PublishProfiles\win10-$(Platform).pubxml</PublishProfile>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.targets" />
+  <Import Project="$(AppxTargetsLocation)Microsoft.WinUI.AppX.targets" />
+</Project>
diff --git a/...ingStarted/ProjectReunion_DemoApp (Package)/ProjectReunion_DemoApp (Package).wapproj.user b/...ingStarted/ProjectReunion_DemoApp (Package)/ProjectReunion_DemoApp (Package).wapproj.user
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup />
+</Project>
diff --git a/...eunion_GettingStarted/ProjectReunion_DemoApp (Package)/build/Microsoft.WinUI.AppX.targets b/...eunion_GettingStarted/ProjectReunion_DemoApp (Package)/build/Microsoft.WinUI.AppX.targets
@@ -0,0 +1,251 @@
+<!--
+  Copyright (c) Microsoft Corporation. Licensed under the MIT License
+-->
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <!-- 
+      The _GetPathToWinUIRegistrations target returns the path to where the registrations xml file is.
+      If invoked in the .wapproj, this will invoke the same target on referenced projects, where it will
+      actually return the location to where the file is on disk in the nuget package.
+    -->
+    <Target Name="_GetPathToWinUIRegistrations" Returns="$(WinUIClassRegistrationsDir)">
+      <!--
+        Invoke this target on the referenced project to get the path to where the registration xml is.
+        This way we can pick up the path to the file from the nuget.
+       -->
+      <MSBuild
+        Projects="@(_MSBuildProjectReferenceExistent)"
+        Condition="'$(MSBuildProjectExtension)' == '.wapproj'"
+        Targets="_GetPathToWinUIRegistrations"
+        SkipNonexistentTargets="true">
+          <Output TaskParameter="TargetOutputs" PropertyName="WinUIClassRegistrationsDir" />
+      </MSBuild>
+
+      <PropertyGroup>
+        <!-- If  not in the .wapproj, then actually return the path to where the registration list is -->
+        <WinUIClassRegistrationsDir Condition="'$(WinUIClassRegistrationsDir)' == '' and '$(MSBuildProjectExtension)'!='.wapproj'">$(MSBuildThisFileDirectory)</WinUIClassRegistrationsDir>
+
+        <!-- Technically you can have multiple .exe files in a single msix. Just trim the property down to a single value if that is the case -->
+        <WinUIClassRegistrationsDir Condition="$(WinUIClassRegistrationsDir.Contains(';'))">$(WinUIClassRegistrationsDir.Substring(0,$(WinUIClassRegistrationsDir.IndexOf(';'))))</WinUIClassRegistrationsDir>
+      </PropertyGroup>
+
+      <Error Text="Unable to find WinRT class registrations for WinUI. Please ensure that the Microsoft.WinUI package restored successfully."
+             Condition="'$(WinUIClassRegistrationsDir)' == '' and '$(MSBuildProjectExtension)'=='.wapproj'"/>
+    </Target>
+
+    <!-- Replaces AppxManifest WinRT registrations for Microsoft.UI.Xaml.dll, post-GenerateAppxManifest. -->
+    <!-- Target runs before manifest validation occurs. Requires output file to support incremental builds. -->
+    <Target
+        Name="_ReplaceMUXWinRTRegistrations"
+        BeforeTargets="_CreateFinalAppxManifestItem"
+        AfterTargets="_GenerateCurrentProjectAppxManifest"
+        DependsOnTargets="_GetPathToWinUIRegistrations"
+        Inputs="$(MSBuildAllProjects);@(_GenerateCurrentProjectAppxManifestInput)"
+        Outputs="$(FinalAppxManifestName).incremental" >
+
+        <ReplaceMUXWinRTRegistrations
+            FullPathToAppxManifest="$(FinalAppxManifestName)"
+            FullPathToLiftedXAMLWinRTRegistrations="$(WinUIClassRegistrationsDir)LiftedWinRTClassRegistrations.xml"
+            PathToXAMLWinRTImplementations="$(PathToXAMLWinRTImplementations)"
+         />
+
+         <Touch
+            Files="$(FinalAppxManifestName).incremental"
+            AlwaysCreate="true"
+         />
+    </Target>
+
+    <UsingTask TaskName="ReplaceMUXWinRTRegistrations" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll">
+        <ParameterGroup>
+            <FullPathToAppxManifest ParameterType="System.String" Required="true" />
+            <FullPathToLiftedXAMLWinRTRegistrations ParameterType="System.String" Required="true" />
+            <PathToXAMLWinRTImplementations ParameterType="System.String" />
+        </ParameterGroup>
+        <Task>
+            <Reference Include="System.Xml" />
+            <Using Namespace="System.Xml" />
+            <Using Namespace="System.Reflection" />
+            <Using Namespace="System.Runtime.InteropServices.WindowsRuntime" />
+            <Using Namespace="System.Collections.Generic" />
+            <Code Type="Fragment" Language="cs"><![CDATA[
+                // Load AppxManifest.xml
+                XmlDocument appxManifest = new XmlDocument();
+                appxManifest.Load(FullPathToAppxManifest);
+
+                XmlNamespaceManager namespaceManager = new XmlNamespaceManager(appxManifest.NameTable);
+                namespaceManager.AddNamespace("w", "http://schemas.microsoft.com/appx/manifest/foundation/windows10");
+
+                // If there exists an existing Extensions node, we'll remove any Microsoft.UI.Xaml.dll, Microsoft.Web.WebView2.Core.dll entry in it
+                // and add the correct DLL mapping. Otherwise, if there doesn't, we'll create one and add it.
+                XmlNode extensionsNode = null;
+
+                foreach (XmlNode node in appxManifest.DocumentElement.SelectNodes("//w:Package/w:Extensions", namespaceManager))
+                {
+                    extensionsNode = node;
+                    break;
+                }
+
+                if (extensionsNode != null)
+                {
+                    XmlNodeList xmlNodeList = appxManifest.DocumentElement.SelectNodes("//w:Package/w:Extensions/w:Extension", namespaceManager);
+
+                    // Remove "Microsoft.UI.Xaml.dll", "Microsoft.Web.WebView2.Core.dll", and
+            	    // "Microsoft.ApplicationModel.Resources.dll" registrations from the 
+                    // AppxManifest file as we will be inserting the entries ourselves
+                    foreach (XmlNode node in xmlNodeList)
+                    {
+                        XmlNode pathNode = node.SelectSingleNode("w:InProcessServer/w:Path", namespaceManager);
+                        if (pathNode.InnerText.Equals("Microsoft.UI.Xaml.dll", StringComparison.InvariantCultureIgnoreCase) ||
+                            pathNode.InnerText.Equals("Microsoft.Web.WebView2.Core.dll", StringComparison.InvariantCultureIgnoreCase) ||
+                            pathNode.InnerText.Equals("Microsoft.ApplicationModel.Resources.dll", StringComparison.InvariantCultureIgnoreCase))
+                        {
+                            extensionsNode.RemoveChild(node);
+                        }
+                    }
+                }
+                else
+                {
+                    extensionsNode = appxManifest.CreateElement("Extensions", "http://schemas.microsoft.com/appx/manifest/foundation/windows10");
+                    appxManifest.DocumentElement.AppendChild(extensionsNode);
+                }
+
+                // Load correct WinRT registration file created during build.  These entries have the correct implemetation DLLs.
+                XmlDocument newRegistrations = new XmlDocument();
+                newRegistrations.Load(FullPathToLiftedXAMLWinRTRegistrations);
+                XmlNamespaceManager namespaceManager2 = new XmlNamespaceManager(newRegistrations.NameTable);
+                namespaceManager2.AddNamespace("w", "http://schemas.microsoft.com/appx/manifest/foundation/windows10");
+                XmlNodeList newRegistrationNodes = newRegistrations.DocumentElement.SelectNodes("/w:Data/w:Extension", namespaceManager2);
+
+                // Add entries for all Microsoft.UI.Xaml types in the AppxManifest
+                foreach (XmlNode node in newRegistrationNodes)
+                {
+                    // If we have a path to our implementation DLLs, we'll add that here.
+                    if (!string.IsNullOrWhiteSpace(PathToXAMLWinRTImplementations))
+                    {
+                        XmlNode pathNode = node.SelectSingleNode("w:InProcessServer/w:Path", namespaceManager);
+                        pathNode.InnerText = PathToXAMLWinRTImplementations + pathNode.InnerText;
+                    }
+                    XmlNode importNode = extensionsNode.OwnerDocument.ImportNode(node, true);
+                    extensionsNode.AppendChild(importNode);
+                }
+
+                // Save the updated AppxManifest.xml file
+                appxManifest.Save(FullPathToAppxManifest);
+
+            ]]></Code>
+        </Task>
+    </UsingTask>
+
+  <PropertyGroup>
+    <MSBuildWarningsAsMessages>
+       $(MSBuildWarningsAsMessages);
+
+       <!-- We don't provide an implementation for Microsoft.winmd, but that's OK, since we're constructing
+            our own Extensions entries in AppxManifest.xml. As such, we'll suppress the warning that that would otherwise raise. -->
+       APPX1707;
+    </MSBuildWarningsAsMessages>
+    <MSBuildWarningsAsMessages Condition="'$(MSBuildProjectExtension)' == '.wapproj'">
+       $(MSBuildWarningsAsMessages);
+
+       <!-- WAP project files can have class libraries with WinMDs complain that they don't have requisite dependencies present -
+            however, due to our custom packaging, they'll be present in the end, so we'll suppress this warning as well. -->
+       MSB3268;
+    </MSBuildWarningsAsMessages>
+  </PropertyGroup>
+
+  <!-- Packing class libraries in a WAP project can erroneously raise a warning thinking that we've packaged multiple executables.
+       We'll suppress that warning, since it's being raised in error. -->
+  <Target Name="_UWPReferencesCheck" Condition="'$(MSBuildProjectExtension)' == '.wapproj'" />
+
+  <!--
+    Setting default project properties for .NET SDK-style projects
+  -->
+  <PropertyGroup Condition="'$(UsingMicrosoftNETSdk)' == 'true'">
+    <SDKIdentifier>Windows</SDKIdentifier>
+    <SDKVersion>10.0</SDKVersion>
+    <DefaultLanguage Condition="'$(DefaultLanguage)'==''">en-US</DefaultLanguage>
+  </PropertyGroup>
+
+  <!--
+    By default, the Nuget targets for .NET Native UWP projects copy MUI files to the root of the AppX.
+    However, we need them in language-specific locations, so we'll move them there after resolving our
+    assembly references, which is what places them in ReferenceCopyLocalPaths.
+
+    Note: This isn't needed for native projects or projects that are using the Microsoft.NET.Sdk, since
+    we manually add them to ReferenceCopyLocalPaths. Once we are fully onto .NET5, we can remove this target.
+  -->
+  <Target Name="_UpdateMuiFilesCopyLocalPath"
+          BeforeTargets="_CopyFilesMarkedCopyLocal"
+          AfterTargets="ResolveAssemblyReferences"
+          Condition="'$(_AddWinUIAssembliesToReferenceCopyLocalPaths)' != 'true'">
+    <PropertyGroup Condition="'$(_MuxRuntimeIdentifier)' == ''">
+      <_MuxRuntimeIdentifier Condition="'$(Platform)' == 'Win32'">win10-x86</_MuxRuntimeIdentifier>
+      <_MuxRuntimeIdentifier Condition="'$(Platform)' != 'Win32'">win10-$(Platform)</_MuxRuntimeIdentifier>
+    </PropertyGroup>
+    <ItemGroup>
+      <ReferenceCopyLocalPaths Update="@(ReferenceCopyLocalPaths)" Condition="'%(ReferenceCopyLocalPaths.NuGetPackageId)' == 'Microsoft.WinUI' and '%(Extension)' == '.mui'">
+        <DestinationSubDirectory>$([MSBuild]::MakeRelative($(MSBuildThisFileDirectory)..\runtimes\$(_MuxRuntimeIdentifier)\native\, %(RootDir)%(Directory)))</DestinationSubDirectory>
+      </ReferenceCopyLocalPaths>
+    </ItemGroup>
+  </Target>
+
+  <Target Name="_UpdateWapProjectPackageFiles"
+        BeforeTargets="_CopyPackageFiles;_CopyUploadPackageFiles"
+        AfterTargets="_ConvertItems"
+        Condition="'$(MSBuildProjectExtension)' == '.wapproj'">
+    <ItemGroup>
+      <!-- In the case of native projects, the TargetPath gets overwritten to remove the language-specific subfolders
+       in the _ConvertItems target, so in the case where that's happened, we'll restore it from the
+       DestinationSubDirectory item metadata. -->
+      <WapProjPackageFile Update="@(WapProjPackageFile)" Condition="'%(WapProjPackageFile.DestinationSubDirectory)' != '' and '%(TargetPath)' == '%(Filename)%(Extension)'">
+        <TargetPath>%(WapProjPackageFile.DestinationSubDirectory)%(TargetPath)</TargetPath>
+      </WapProjPackageFile>
+      <UploadWapProjPackageFile Update="@(UploadWapProjPackageFile)" Condition="'%(UploadWapProjPackageFile.DestinationSubDirectory)' != '' and '%(TargetPath)' == '%(Filename)%(Extension)'">
+        <TargetPath>%(UploadWapProjPackageFile.DestinationSubDirectory)%(TargetPath)</TargetPath>
+      </UploadWapProjPackageFile>
+    </ItemGroup>
+  </Target>
+
+  <!--
+    Add a dependency for the app against VCLibs.Desktop, which contains the CRT DLLs that WinUI 3 is linked against. -->
+  <ItemGroup Condition="'$(OutputType)' == 'Exe' or '$(OutputType)' == 'AppContainerExe' or '$(MSBuildProjectExtension)'=='.wapproj'">
+    <SDKReference Include="Microsoft.VCLibs.Desktop, Version=14.0" />
+    <!-- Needed for ucrtbased.dll when running a debug build. -->
+    <SDKReference Include="Microsoft.UniversalCRT.Debug, Version=$(TargetPlatformVersion)" Condition="'$(Configuration)' == 'Debug'" />
+    <!-- Needed until Microsoft.ApplicationModel.Resources.dll and Microsoft.Web.WebView2.Core.dll
+         no longer depend on the _app version of CRT DLLs. -->
+    <SDKReference Include="Microsoft.VCLibs, Version=14.0" />
+  </ItemGroup>
+
+  <!-- In order to have the Microsoft.UniversalCRT.Debug SDK reference included in the AppX, we need to
+       set IncludeSDKRedistOutputGroup to true. -->
+  <Target Name="IncludeSDKRedistOutputGroup" BeforeTargets="GetPackagingOutputs" Condition="('$(OutputType)' == 'AppContainerExe' or '$(MSBuildProjectExtension)'=='.wapproj') and '$(Configuration)' == 'Debug'">
+    <PropertyGroup>
+      <IncludeSDKRedistOutputGroup>true</IncludeSDKRedistOutputGroup>
+    </PropertyGroup>
+  </Target>
+
+  <!--
+    WindowsAppContainer is the property that you can set in your .NET Desktop project to turn it into a UWP.
+    When the ProjectReferenceWithExtraMetadata.TargetPlatformIdentifier is set to UAP, this causes the AppxManifest.xml
+    generation targets to write in the app entry point which causes UWP activation.
+  -->
+  <Target Name="UpdateTargetPlatformIdentifer" AfterTargets="SetProjectReferenceProperties" Returns="@(ProjectReferenceWithExtraMetadata)">
+    <ItemGroup>
+      <ProjectReferenceWithExtraMetadata Update="@(ProjectReferenceWithExtraMetadata)" Condition="'%(WindowsAppContainer)'=='true'">
+        <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
+      </ProjectReferenceWithExtraMetadata>
+    </ItemGroup>
+  </Target>
+
+  <!-- NuGet restore is now supported for wapproj files, so we need to supply an AssetTargetFallback value
+       in order for that not to raise an error. -->
+  <PropertyGroup Condition="'$(MSBuildProjectExtension)' == '.wapproj'">
+    <AssetTargetFallback>net5.0-windows$(TargetPlatformVersion)</AssetTargetFallback>
+  </PropertyGroup>
+
+  <!-- See https://github.com/microsoft/CsWinRT/issues/373 -->
+  <Target Name="ValidateNoPublishTrimmed" BeforeTargets="PrepareForBuild" Condition="'$(PublishTrimmed)'=='true'">
+    <Error Text="Publishing with IL trimming is not yet supported."/>
+  </Target>
+
+</Project>