HtmlFromHtmlAfter.cs

private ISpanned FromHtml(string source)
{
    // app specific code

    if (Build.VERSION.SdkInt >= BuildVersionCodes.N)
    {
        return Html.FromHtml(source, FromHtmlOptions.ModeLegacy);
    }
    
#pragma warning disable CS0618 // Type or member is obsolete
    return Html.FromHtml(source);
#pragma warning restore CS0618 // Type or member is obsolete
}

HtmlFromHtmlBefore.cs

private ISpanned FromHtml(string source)
{
    // app specific code

    return Html.FromHtml(source);
}