在做一些技巧和复杂的配置之前，尝试删除bin和obj文件夹，然后进行编译。解决了同样的问题

对我来说，唯一干净利落地解决这个问题的方法。NET 4.6.1)不仅为实际使用System.Net的项目添加了对System.Net.Http V4.3.4的Nuget引用。Http，但也启动项目(在我的情况下是一个测试项目)。

(这很奇怪，因为正确的System.Net.Http.dll存在于测试项目的bin目录中，.config assemblyBingings看起来也不错。)

对我来说，我又加了一块鸡块，问题就解决了

这将在。net 4.7.2和Visual Studio 2017(15.9.4)中工作:

删除web /应用程序。配置绑定重定向 删除System.Net.Http的NuGet包 打开“添加新引用”，直接链接到。net 4.7.2附带的4.2.0.0版本

删除name="System.Net. "的dependentAssembly。Http”来自web。Config对我也有用。我从网上评论了这部分。配置，它为我工作。 如果以上所有解决方案都不适用，请尝试如下所示的注释或删除。

<!--<dependentAssembly>
        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
        <bindingRedirect oldVersion="0.0.0.0-4.1.1.2" newVersion="4.0.0.0"/>
      </dependentAssembly>-->

你可以通过将项目升级到. net Framework 4.7.2来解决这个问题。这个问题由微软的Alex giondea回答。请给他投票，因为他真的值得!

This is documented as a known issue in .NET Framework 4.7.1. As a workaround you can add these targets to your project. They will remove the DesignFacadesToFilter from the list of references passed to SGEN (and add them back once SGEN is done) <Target Name="RemoveDesignTimeFacadesBeforeSGen" BeforeTargets="GenerateSerializationAssemblies"> <ItemGroup> <DesignFacadesToFilter Include="System.IO.Compression.ZipFile" /> <_FilterOutFromReferencePath Include="@(_DesignTimeFacadeAssemblies_Names->'%(OriginalIdentity)')" Condition="'@(DesignFacadesToFilter)' == '@(_DesignTimeFacadeAssemblies_Names)' and '%(Identity)' != ''" /> <ReferencePath Remove="@(_FilterOutFromReferencePath)" /> </ItemGroup> <Message Importance="normal" Text="Removing DesignTimeFacades from ReferencePath before running SGen." /> </Target> <Target Name="ReAddDesignTimeFacadesBeforeSGen" AfterTargets="GenerateSerializationAssemblies"> <ItemGroup> <ReferencePath Include="@(_FilterOutFromReferencePath)" /> </ItemGroup> <Message Importance="normal" Text="Adding back DesignTimeFacades from ReferencePath now that SGen has ran." /> </Target> Another option (machine wide) is to add the following binding redirect to sgen.exe.config: <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.IO.Compression.ZipFile" publicKeyToken="b77a5c561934e089" culture="neutral" /> <bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.0.0.0" /> </dependentAssembly> </assemblyBinding> </runtime> This will only work on machines with .NET Framework 4.7.1. installed. Once .NET Framework 4.7.2 is installed on that machine, this workaround should be removed.