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在针对 .NET 5 或更高版本进行开发时，直接引用 Windows Metadata 组件是不被支持的。

c#.net.net-core.net-5.net-6.0
3

我有一个 .Net5.0 的 C# 类库项目，它一直构建得很好。但是，在将目标框架更改为 <TargetFramework>net6.0</TargetFramework> 后，构建就开始出现以下错误信息：

C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.AI.MachineLearning.MachineLearningContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.AI.MachineLearning.Preview.MachineLearningPreviewContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Activation.ActivatedEventsContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Activation.ActivationCameraSettingsContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Activation.ContactActivatedEventsContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Activation.WebUISearchActivatedEventsContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Background.BackgroundAlarmApplicationContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Calls.Background.CallsBackgroundContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Calls.CallsPhoneContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Calls.CallsVoipContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Calls.LockScreenCallContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.CommunicationBlocking.CommunicationBlockingContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.FullTrustAppContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Preview.InkWorkspace.PreviewInkWorkspaceContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Preview.Notes.PreviewNotesContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Resources.Management.ResourceIndexerContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Search.Core.SearchCoreContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(1003,5): error NETSDK1130: Windows.ApplicationModel.Search.SearchContract.winmd cannot be referenced. Referencing a Windows Metadata component directly when targeting .NET 5 or higher is not supported. For more information, see https://aka.ms/netsdk1130
...

即使将配置还原回 <TargetFramework>net5.0</TargetFramework>，问题仍然存在。请注意，我正在使用已安装 .Net6.0 SDK 的 Visual Studio 2019。以下是 csproj 文件:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Ben.Demystifier" Version="0.1.4" />
    <PackageReference Include="BundlerMinifier.Core" Version="3.2.449" />
    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.6.1" />
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Microsoft.AspNetCore.Authentication.AzureAD.UI" Version="2.1.1" />
    <PackageReference Include="Microsoft.Identity.Client" Version="4.30.1" />
    <PackageReference Include="Microsoft.IdentityModel.Clients.ActiveDirectory" Version="4.5.0" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.1.1" />
    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
    <PackageReference Include="System.Runtime.Serialization.Formatters" Version="4.3.0" />
    <PackageReference Include="Synergix.WE.ComputerManagement" Version="2.4.34" />
  </ItemGroup>

  <ItemGroup>

更新:

这个包<PackageReference Include="Synergix.WE.ComputerManagement" Version="2.4.34" />是使用.netStandard2.1构建的，当从引用中删除它时，错误就消失了，但由于内部依赖关系，编译肯定会失败。在.net6项目中引用一个.netStandard库是否不可能？

1个回答
3
解决方案：

1 - 将 TargetFramework 设置为 <TargetFramework>net6.0-windows$([Microsoft.Build.Utilities.ToolLocationHelper]::GetLatestSDKTargetPlatformVersion('Windows', '10.0'))</TargetFramework>

2 - 通过 <PackageReference Include="Microsoft.Windows.CsWinRT" Version="1.4.1" /> 添加一个名为 CsWinRT 的软件包引用。

顺便提一下，这里 是编译器错误，而这里 是微软对此的建议（特别是查看错误部分）。 - Hugh W
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