我在4.6.1中有一个类引用了4.6.2中的接口…将类升级到462修复了这个问题。

我遇到了这个问题。在我的情况下，我删除所有项目中的所有bin和obj文件夹，然后这个错误将为我解决。再试一次，解决这个问题

我在一个.csproj文件中有一个合并冲突，最终得到了一个构建目标的两个副本。

<编译包含=“SystemCodes\APSystemCodes.cs” />

在我消除了复制构建工作。

以我为例，在注意到我引用了. net Framework 4.7项目作为. net Framework 4.6.1项目的依赖项后，我解决了这个问题。在将项目4.7迁移到4.6.1之后，我的应用程序正常编译

在我的案例中，设置目标框架解决了问题:

右键单击项目并选择Properties 在Application中，将目标框架更改为与主项目相同(例如。"．NET Framework 4.5”)。

The Visual Studio IDE doesn't do any building behind the scenes, the Msbuild application does. The VS IDE essentially just constructs the project file that is used by Msbuild and quite often it makes mistakes if you leave it up to the IDE to figure things out on it's own. If you are getting the Metadata file '.dll' could not be found error it is likely due to the fact that the correct/expected assemblies are not being found. So perhaps Visual Studio might be creating a project file for a 4.5 framework app, and expecting 4,5 assemblies, while you are referencing 4.0 assemblies. So look at your Visual Studio settings for incompatibilities or go into the project file yourself, and manually fix it by specifying the correct path <Reference Include="C:\\correct path to assembly\\yourAssembly.dll" />.