Asp.net core 标记助手智能感知问题

标记帮助程序未显示intellisense。此外，它们属性的着色也不起作用。我可能错过了什么？以下是我的

.cspro

文件注意：My _ViewImports.cshtml视图包含

@addTagHelper*、Microsoft.AspNetCore.Mvc.TagHelpers

.csproj文件

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
    <PreserveCompilationContext>true</PreserveCompilationContext>
    <AssemblyName>TestProj</AssemblyName>
    <OutputType>Exe</OutputType>
    <PackageId>TestProj</PackageId>
    <UserSecretsId>aspnet-TestProj-6af8ade3-87ff-4468-a9ce-8bb69c696ab8</UserSecretsId>
    <RuntimeFrameworkVersion>1.1.1</RuntimeFrameworkVersion>
    <PackageTargetFallback>$(PackageTargetFallback);dotnet5.6;portable-net45+win8</PackageTargetFallback>
  </PropertyGroup>

  <ItemGroup>
    <None Remove="Properties\PublishProfiles\TestProjP.pubxml" />
    <None Remove="Properties\PublishProfiles\FolderProfile.pubxml" />
    <None Remove="Properties\PublishProfiles\FolderProfile1.pubxml" />
  </ItemGroup>

  <ItemGroup>
    <None Update="wwwroot\**\*;Views\**\*;Areas\**\Views">
      <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
    </None>
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="bootstrap" Version="2.3.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="1.0.0" />
    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="1.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Authentication.Cookies" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Identity" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration.Tools" Version="1.1.0-preview4-final" />
    <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="1.1.1" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="1.1.0">
      <PrivateAssets>All</PrivateAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.AspNetCore.Session" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="1.1.1" />
    <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="1.1.0" />
    <PackageReference Include="BundlerMinifier.Core" Version="2.3.327" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="1.1.2" />
    <PackageReference Include="EPPlus.Core" Version="1.4.0" />
  </ItemGroup>

 <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.0" />
  </ItemGroup>

</Project>

netcoreapp1.1
真的
测试项目
Exe
测试项目
aspnet-TestProj-6af8ade3-87ff-4468-a9ce-8bb69c696ab8
1.1.1
$（PackageTargetFallback）；dotnet5.6；portable-net45+win8
保存最新
全部的

请参考以下内容：，请以管理员身份重新运行VS 2017安装程序，然后单击“更新”升级到VS 2017 15.3.3版本，我尝试创建一个新的Asp.NET核心web应用程序对其进行测试，其工作正常，如下所示：

---

您是否在任何地方添加了

@addTagHelper

指令？如果没有，请尝试将

@addTagHelper*、Microsoft.AspNetCore.Mvc.TagHelpers

添加到您的_ViewImports.cshtml文件中。@请参阅SharpCode以回答您的问题，我已在我的帖子中添加了一条注释，以方便其他读者阅读。@nam，请参阅此：，请以管理员身份重新运行VS 2017安装程序，然后单击“更新”以升级到VS 2017 15.3.3版本，我尝试创建一个新的Asp.NET核心web应用程序来测试它，它的工作原理如下：，如果此问题仍然存在，请分享有关您的问题的详细信息。@Sara MSFT根据您的建议，我升级到了

VS 2017 15.3

，并且成功了（谢谢）。@nam，很高兴听到您的问题得到解决，我用此解决方案回复了您，您有空时可以将其标记为答案：）