Custom tag helper not working

Question

I followed a few guides on creating a custom tag helper for ASP Core.

This is my helper:

using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.Asp         


        

Answer 1

I had the same problem, but it was the result of a rogue, accidental semi-colon at the end of the @addTagHelper line.

I had:

@addTagHelper *, ToolConstrolSystem;

Instead of:

@addTagHelper *, ToolConstrolSystem

While the solution will build and run fine, the tag helper will not work if the @addTagHelper line contains a semi-colon.