taghelpers intellisense not working in Preview5

Question

I downloaded and installed latest .NET Core:

dotnet --version
1.0.0-preview5-004478

I also updated my AspNetCore project's package references:

<PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp1.1</TargetFramework>
    <PreserveCompilationContext>true</PreserveCompilationContext>
  </PropertyGroup>
  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>
<ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.TagHelpers" Version="1.1.0" />
    <PackageReference Include="Microsoft.NETCore.App" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Razor.Tools" Version="1.1.0-preview4-final" />
    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="1.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="1.1.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="1.1.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="1.1.0-preview4-final" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="1.1.0-preview4-final" />
    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="1.1.0" />
    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="1.1.0" />
    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.Design" Version="1.1.0" />   </ItemGroup>

It seems like tooling not working well yet for the latest versions. For example when I try to run dotnet ef it complains about missing project.json - which is depricated now.

I'm using Visual Studio 2017 Community RC and the integrated PM console can run add-migration, update-database,... so I don't care about missing dotnet ef support but if you had any idea of any workaround I would appreciate that becasue I also like to work with VS Code instead of the Studio.

My problem is now I try to build an ASP.Core MVC website with heavy usage of tag helpers. But the intellisense not working for that:

Answer 1

There is a known issue for VS2017 https://github.com/aspnet/Tooling/blob/master/known-issues-vs2017.md#tag-helpers-do-not-work and it links to a workaround "Install the Razor Language Service extension"

Update:

For the new release of Visual Studio 2017 Preview 15.3 (and from now on, i supposed) the razor language service is selected as a component inside the Visual Studio instalation process when you select the ASP.NET and web development workload

Answer 2

For Visual studio 17' you need to install this extension and it will work.

https://marketplace.visualstudio.com/items?itemName=ms-madsk.RazorLanguageServices

If you made the app with an MVC template, you don't have to install anything else from NuGet.