我正在从一个.NET MVC 5 Web应用程序迁移到一个.NET Core 2.2 Web API项目沿着五个.NET Standard 2.0项目，所有这些项目都位于一个解决方案下。
我现在收到28个关于包冲突的警告（MSB 3277），这些警告都在System命名空间中。例如，Version=4.0.11.0和Version=4.0.14.0之间似乎存在System.Collections.Concurrent的版本冲突（请参阅下面的错误块）。

已尝试疑难排解：

1.我试着卸载所有我不使用的.NET核心SDK，目前安装了2.2.300。但没有成功。
1.我尝试在解决方案级别进入NuGet来安装缺少的程序集，但是4.0.14甚至不在选择列表中。4.3，4.0.12，4.0.10和4.0.0。我确实尝试在所有项目中安装4.3，但没有成功。

Web上的其他解决方案似乎要么建议在SDK上降低一个版本，要么在 *.csproj文件中硬编码一个引用-如果没有必要，我都不喜欢这样做。我不喜欢前者，因为向后移动看起来违反直觉，我也不喜欢后者，因为硬编码一个修复程序永久使用一个旧的包，这似乎是一个非常糟糕的主意，因为它似乎不太可能更新到发布的较新版本。
有人知道如何解决这些警告吗？任何帮助都非常感谢。

其中一个警告的建置详细输出：

Line 5419: 3>    Dependency "System.Collections.Concurrent, Version=4.0.14.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".
Line 5420: 3>        Could not resolve this reference. Could not locate the assembly "System.Collections.Concurrent, Version=4.0.14.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.
Line 5675: 3>    There was a conflict between "System.Collections.Concurrent, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" and "System.Collections.Concurrent, Version=4.0.14.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".
Line 5675: 3>    There was a conflict between "System.Collections.Concurrent, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" and "System.Collections.Concurrent, Version=4.0.14.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".
Line 5676: 3>        "System.Collections.Concurrent, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was chosen because it was primary and "System.Collections.Concurrent, Version=4.0.14.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was not.
Line 5676: 3>        "System.Collections.Concurrent, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was chosen because it was primary and "System.Collections.Concurrent, Version=4.0.14.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was not.
Line 5677: 3>        References which depend on "System.Collections.Concurrent, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" [C:\Program Files\dotnet\sdk\NuGetFallbackFolder\netstandard.library\2.0.3\build\netstandard2.0\ref\System.Collections.Concurrent.dll].
Line 5677: 3>        References which depend on "System.Collections.Concurrent, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" [C:\Program Files\dotnet\sdk\NuGetFallbackFolder\netstandard.library\2.0.3\build\netstandard2.0\ref\System.Collections.Concurrent.dll].

更新

更多故障排除：
https://github.com/dotnet/standard/issues/731
https://github.com/dotnet/corefx/issues/32561
这是Microsoft错误吗？

生成时列出所有28个警告的最小输出：

3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Collections.Concurrent" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Collections" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Collections.NonGeneric" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.ComponentModel" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Diagnostics.Debug" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Diagnostics.Process" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Diagnostics.Tracing" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.IO.FileSystem" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Linq" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Net.Primitives" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Net.Security" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Resources.ResourceManager" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Runtime" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Runtime.Extensions" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Runtime.InteropServices.RuntimeInformation" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Security.Cryptography.Algorithms" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Security.Cryptography.Csp" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Security.Cryptography.Encoding" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Security.Cryptography.Primitives" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Security.Cryptography.X509Certificates" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Text.Encoding.Extensions" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Text.RegularExpressions" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Threading" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Threading.Tasks" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Threading.ThreadPool" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Threading.Timer" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.
3>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(2106,5): warning MSB3277: Found conflicts between different versions of "System.Memory" that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed.

3条答案

按热度按时间

ux6nzvsh1#

这里的问题是强命名和至少“System.Collections.Concurrent”的混合程序集版本，但可能是所有28个警告。
我尝试在解决方案级别进入NuGet来安装缺少的程序集，但是4.0.14甚至不在选择列表中。
您看到的版本是NuGet版本，这些版本与程序集版本不同。例如，NuGet版本4.3.0-preview 1 -24530-04具有.NET标准1.3的程序集版本4.0.13.0：

请注意，在同一软件包中，netcore 50的程序集版本是4.0.10.0！
这是Microsoft错误吗？
不，它是一个功能。当程序集是strong named.时，完整版本应该匹配。如果不是，这将给予警告。当不使用GAC时，只能发布程序集的一个版本-如果使用多个版本，那么是哪一个？注意-所有Microsoft的程序集都具有强名称。
问题就在这里：

您正在包含建置为System.Collections.Concurrent组件版本www.example.com的（强式名称）组件4.0.14.0
您在应用程序组件版本www.example.com中（间接）4.0.11.0使用System.Collections.Concurrent组件。

所以一个组件有两个版本！

溶液

有多种可能的解决方案：
1.在任何地方使用System.Collections.Concurrent的相同程序集版本（您需要找出哪个NuGet包是程序集版本4.0.14.0）。这在大多数情况下是不可行的。
1.将4.0.11.0和4.0.14.0版本安装到GAC中--这在现在也不是一个很流行的选项--〉对于.NET核心不可能，因为.NET核心没有GAC。请参见Is there any GAC equivalent for .NET Core?
1.在. config中使用<bindingRedirect>。请参阅Redirecting Assembly Versions | Microsoft Docs
例如，对于“系统.收集.并发”：

<dependentAssembly>
    <assemblyIdentity name="System.Collections.Concurrent" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
    <bindingRedirect oldVersion="4.0.0.0-4.0.14.0" newVersion="4.0.11.0" />
</dependentAssembly>

最终注解

有28个版本问题，但有一个很大的变化，多个问题都可以通过一个bindingRedirect解决。所以最好的方法是从一个开始（最好是最顶级的），然后重建和重复，直到所有问题都解决。
还请注意，降级程序集有点棘手，例如，在www.example.com上构建的程序集4.0.13.0可以使用在www.example.com +中引入/更改的功能4.0.11.0。因此，您也可以更新版本并在“newVersion”属性中使用该版本

赞(0）回复(0）举报 2022-12-04

cyvaqqii2#

每个程序集的绑定重定向（bindingRedirect）可以在配置中手动执行，或者在项目文件属性中有一个选项。请检查它，然后升级。

5hcedyr03#

@Julian的解决方案对我不起作用。在我的例子中，我有一个测试项目引用了另一个具有业务逻辑的项目。依赖关系图如下所示：

Project.BL.Tests
↳ Project.BL

Project.BL
↳ Microsoft.Extensions.DependencyInjection.Abstractions Version="6.0.0"
↳ ThirdParty.Nuget.Package

ThirdParty.Nuget.Package
↳ Microsoft.Extensions.DependencyInjection.Abstractions Version="3.1.0"

当我试图在测试中创建一个ServiceCollection示例时，在构建时抛出了错误，指出DI.Abstractions v6和v3冲突。

<PropertyGroup>
    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
    <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
</PropertyGroup>

但这并没有解决问题。
解决方案是将ThirdParty.Nuget.Package依赖项直接添加到测试项目：

Project.BL.Tests
↳ Project.BL
↳ ThirdParty.Nuget.Package

Visual Studio 如何解决.NET Core包版本冲突

3条答案

溶液

最终注解

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