Asp.net core 1.1.1的升级错误：'；文件模式'；存在于'；System.IO.FileSystem.Primitives'；和'；System.Runtime，版本=4.2.0.0

将我的项目更新为1.1.1后，以下两行不起作用：

var d=newfilestream（Path.Combine（PathToFile，$“{fileName}.txt”），FileMode.Open）；
var fs=新的StreamReader（d，Encoding.UTF8）

当我将通道恢复到csproj文件时，错误消失了。我做错了什么

我得到以下错误：

错误CS0433“System.IO，版本=4.1.0.0，区域性=中性，PublicKeyToken=b03f5f7f11d50a3a”和“System.Runtime.Extensions，版本=4.2.0.0，区域性=中性，PublicKeyToken=b03f5f7f11d50a3a”中都存在类型“StreamReader”
错误CS0433“System.IO.FileSystem.Primitives，Version=4.0.1.0，Culture=neutral，PublicKeyToken=b03f5f7f11d50a3a”和“System.Runtime，Version=4.2.0.0，Culture=neutral，PublicKeyToken=b03f5f7f11d50a3a”中都存在类型“FileMode”
错误CS0433“System.Text.Encoding，Version=4.0.10.0，Culture=neutral，PublicKeyToken=b03f5f7f11d50a3a”和“System.Runtime，Version=4.2.0.0，Culture=neutral，PublicKeyToken=b03f5f7f11d50a3a”中都存在“Encoding”类型
错误CS0433“System.Text.Encoding，Version=4.0.10.0，Culture=neutral，PublicKeyToken=b03f5f7f11d50a3a”和“System.Runtime，Version=4.2.0.0，Culture=neutral，PublicKeyToken=b03f5f7f11d50a3a”中都存在“Encoding”类型
错误CS1503参数1:无法从“字符串”转换为“System.IntPtr”
我的csproj文件是：

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
    <DebugType>portable</DebugType>
    <AssemblyName>Backend</AssemblyName>
    <OutputType>Exe</OutputType>
    <PackageId>Backend</PackageId>
    <PackageTargetFallback>portable-net45+win8</PackageTargetFallback>
    <DockerComposeProjectPath>..\docker-compose.dcproj</DockerComposeProjectPath>
  </PropertyGroup>
  <ItemGroup>
    <Compile Remove="Model\**" />
    <Content Remove="Model\**" />
    <EmbeddedResource Remove="Model\**" />
    <None Remove="Model\**" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\Engine\Engine.csproj" />
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.ResponseCompression" Version="1.0.1" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.1" />
    <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="1.1.0" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="1.1.0" />
  </ItemGroup>
  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">
    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Cors" Version="1.1.1" />
    <PackageReference Include="System.ValueTuple" Version="4.3.0" />
  </ItemGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.DotNet.Watcher.Tools" Version="1.0.0-msbuild3-final" />
  </ItemGroup>
</Project>


netcoreapp1.1
便携式的
后端
Exe
后端
portable-net45+win8
..\docker-compose.dcproj

以前的版本：

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
    <DebugType>portable</DebugType>
    <AssemblyName>Backend</AssemblyName>
    <OutputType>Exe</OutputType>
    <PackageId>Backend</PackageId>
    <PackageTargetFallback>portable-net45+win8</PackageTargetFallback>
    <DockerComposeProjectPath>..\docker-compose.dcproj</DockerComposeProjectPath>
  </PropertyGroup>
  <ItemGroup>
    <Compile Remove="Model\**" />
    <Content Remove="Model\**" />
    <EmbeddedResource Remove="Model\**" />
    <None Remove="Model\**" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\Engine\Engine.csproj" />
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="1.0.1" />
    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="1.0.1" />
    <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.ResponseCompression" Version="1.0.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.0" />
    <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="1.0.0" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="1.1.0-msbuild3-final" />
  </ItemGroup>
  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">
    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Cors" Version="1.1.0" />
    <PackageReference Include="System.IO" Version="4.3.0" />
    <PackageReference Include="System.ValueTuple" Version="4.3.0" />
  </ItemGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.DotNet.Watcher.Tools" Version="1.0.0-msbuild3-final" />
  </ItemGroup>
</Project>


netcoreapp1.1
便携式的
后端
Exe
后端
portable-net45+win8
..\docker-compose.dcproj
请参见

重建nuget包可以修复它。
转到%USERPROFILE%/.nuget并将其全部清除

及

@ericwj根据网络工具团队的joe所说，
这是一个众所周知的问题。BrowserLink软件包有一个版本的引用不正确，显然是.NET Core 1.1 CLI安装程序附带的版本。然而，在RC.3中，我们从核心1.1模板中删除了BrowserLink，因此新项目不应该出现问题

在我的例子中，这发生在安装SPA模板之后。我必须修复VisualStudio，以便它能够修复版本
 以前的版本包含
System.IO的包参考，我测试了您的建议，但没有帮助-我仍然收到一个错误。特别有趣的是，版本冲突是基于IO版本4.**1**的，尽管我安装了版本4.**3**。