在visual studio中改变构建的冗长将有助于指向正确的方向。按照以下步骤更改VS中的详细信息

进入工具->选项菜单在VS 开放项目和解决方案->构建和运行 更改MSBuild项目构建输出详细信息的值。选择 分别是安静、最小、正常、详细和诊断

检查VS中的输出窗口(Ctrl+Alt+O)，查看构建日志中的更改。

运行msbuild Foo。sln /t:Rebuild /v:diag(来自C:\Program Files (x86)\MSBuild\12.0\ bin)从命令行构建解决方案并获得更多详细信息，然后找到.csproj. diag文件。它将记录警告并检查其引用以及使用相同公共程序集但版本不同的其他项目的引用。

编辑:你也可以在VS2013中直接设置构建细节。转到工具>选项菜单，然后转到项目和解决方案，将MSBuild verbose设置为诊断。

编辑:有些澄清，因为我自己也有一个。在我的例子中，警告是由于我使用Resharper提示符添加引用，而不是添加引用对话框，这使得它无版本，即使v4和v12都可以选择。

<Reference Include="Microsoft.Build, Version=12.0.0.0, ..." />
<Reference Include="Microsoft.Build.Framework" />

vs

<Reference Include="Microsoft.Build, Version=12.0.0.0, ..." />
<Reference Include="Microsoft.Build.Framework, Version=12.0.0.0, ..." />

在使用/v:diag的MSBuild日志中，它看起来如下所示。给出两个引用相冲突的细节:-

  There was a conflict between 
  "Microsoft.Build.Framework, Version=4.0.0.0, ..." and 
  "Microsoft.Build.Framework, Version=12.0.0.0, ...". (TaskId:16)

      "Microsoft.Build.Framework, Version=4.0.0.0, ..." was chosen because it was primary and 
      "Microsoft.Build.Framework, Version=12.0.0.0, ..." was not. (TaskId:16)

      References which depend on "Microsoft.Build.Framework, Version=4.0.0.0, ..." 
      [C:\...\v4.5.1\Microsoft.Build.Framework.dll]. (TaskId:16)

          C:\...\v4.5.1\Microsoft.Build.Framework.dll (TaskId:16)
            Project file item includes which caused reference "C:\...\v4.5.1\Microsoft.Build.Framework.dll". (TaskId:16)
              Microsoft.Build.Framework (TaskId:16)

      References which depend on "Microsoft.Build.Framework, Version=12.0.0.0, ..." 
      [C:\...\v12.0\Microsoft.Build.Framework.dll]. (TaskId:16)

          C:\...\v12.0\Microsoft.Build.dll (TaskId:16)
            Project file item includes which caused reference "C:\...\v12.0\Microsoft.Build.dll". (TaskId:16)
              Microsoft.Build, Version=12.0.0.0, ... (TaskId:16)

          C:\...\v12.0\Microsoft.Build.Engine.dll (TaskId:16)
            Project file item includes which caused reference "C:\...\v12.0\Microsoft.Build.Engine.dll". (TaskId:16)
              Microsoft.Build, Version=12.0.0.0, ... (TaskId:16)

C:\Program Files (x86)\MSBuild\12.0\bin\Microsoft.Common.CurrentVersion.targets(1697,5): warning MSB3277: 
Found conflicts between different versions of the same dependent assembly that could not be resolved.  
These reference conflicts are listed in the build log when log verbosity is set to detailed. 
[C:\Users\Ilya.Kozhevnikov\Dropbox\BuildTree\BuildTree\BuildTree.csproj]

在将包从nuget切换到本地引用dll后，我遇到了这个问题。这个问题是app.config中的旧的运行时绑定。

我该如何让警告消失呢?

你可能需要重新安装或升级你的NuGet包来解决这个问题。

I found that, sometimes, nuget packages will install (what I'm guessing are) .NET Core required components or other items that conflict with the already-installed framework. My solution there was to open the project (.csproj) file and remove those references. For example, System.IO, System.Threading and such, tend to be added when Microsoft.Bcl is included via some recently installed NuGet package. There's no reason for specific versions of those in my projects, so I remove the references and the project builds. Hope that helps.

您可以在项目文件中搜索“参考”并删除冲突。如果它们包含在系统中，那么去掉它们，构建应该可以工作。这可能不能回答这个问题的所有情况-我确保你知道什么对我有用:)

我注释掉的例子:

< !<参考Include=“系统。”Runtime，版本=2.6.9.0,Culture=neutral, PublicKeyToken= b03f5f7f3a, processorArchitecture=MSIL"> -> < !- <HintPath>$(解决方案)packages\Microsoft.Bcl.1.1.9\lib\net40\系统. runtpath > < !<Private>True</Private> -> < !</参考> ->

我可以解决这个问题，在web项目中安装Newtonsoft Json