Tag helper not being processed in ASP.NET Core 2

Question

I\'ve added the following tag helper:

using System;
using System.Linq;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.Rendering;         


        

Answer 1

When registering Tag Helpers, it’s the assembly that is required, not the namespace - explained in the docs.

...the second parameter "Microsoft.AspNetCore.Mvc.TagHelpers" specifies the assembly containing the Tag Helpers. Microsoft.AspNetCore.Mvc.TagHelpers is the assembly for the built-in ASP.NET Core Tag Helpers.

So in your case, you can just change this:

@addTagHelper *, X.TagHelpers

To this:

@addTagHelper *, X