ASP.net Core 2.0客户标记助手无法在视图中使用

Question

我在ASP.net Core 2.0中的项目。我正在尝试创建自定义标记帮助程序，但没有成功。

例如，我在下面创建的Tag帮助器未显示在intellisense中或在contact.html中呈现。

帮助？

EmailTagHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System.Threading.Tasks;

namespace Tallog.TagHelpers
{
    [HtmlTargetElement("my-email")]
    public class EmailTagHelper : TagHelper
    {
        private const string EmailDomain = "example.com";

        // Can be passed via <email mail-to="..." />. 
        // Pascal case gets translated into lower-kebab-case.
        public string MailTo { get; set; }

        public override void Process(TagHelperContext context, TagHelperOutput output)
        {
            output.TagName = "a";    // Replaces <email> with <a> tag

            var address = MailTo + "@" + EmailDomain;
            output.Attributes.SetAttribute("href", "mailto:" + address);
            output.Content.SetContent(address);
        }
    }
} 

_ViewImports.cshtml

@using Microsoft.AspNetCore.Identity
@using Tallog
@using Tallog.Models
@using Tallog.TagHelpers
@addTagHelper "*, Microsoft.AspNetCore.Mvc.TagHelpers"
@addTagHelper "*, Tallog.TagHelpers"

Contact.html

@{
        ViewData["Title"] = "Contact";
        ViewData["PageTitle"] = "Contact";
    }

    <h3>@ViewData["Message"]</h3>

    <address>
        <strong>Support:</strong><my-email mail-to="Support"></my-email><br />
        <strong>Marketing:</strong><my-email mail-to="Marketing"></my-email>    
    </address>

解决方案结构