markdig | CommonMark compliant , extensible Markdown processor

In an old project, we were using Microsoft.Toolkit.Parsers.Markdown to parse Markdown content.

For example, we use that library to get the list of headings in a MD block, like this:

I am experiencing a peculiar error after migrating my Asp.Net Core MVC Webapp solution from .Net Core 2.2 to .Net Core 3.1.
I followed the steps described in the official docs, updating Program, Startup, nuget packages ...

I am using Syncfusion Essential Studio 2 - which I believe is not related to this error - and in a number of views I am declaring variables/creating objects, like creating a DropDownList which I use for a lookup in a Datagrid:

I have the following code in my editor:

I have implemented the following code in wwwroot - index.html:

The syntax & values to my knowledge are alright. See below.

So I am using this solution Example #2 on how to properly render HTML in Blazor while it is sanitized

Basically I am trying to make a box that switches between editing Standard Markdown to rendering it as HTML. I used Markdig package to convert Standard Markdown string to HTML.

But the trouble I have is that whenever renderedHTML is updated the MarkUpStringSanitizedComponent component remains the same. In fact it always remains the same as renderedHTML was initialized, it does not get updated. Maybe I did data binding wrong?

Here is how I use the component inside of editBox.razor

I try to add a custom tag helper to my project that would convert a markdown text to html. For the conversion I tried using both Makrdig.Markdown and CommonMarkConverter.Convert, without success, but I think that the problem lies in not detecting my implementation by the razor page.

My TagHelper: