Default.cshtml

@using Progress.Sitefinity.AspNetCore.TagHelpers;
@using Progress.Sitefinity.AspNetCore.Mvc.Rendering;

@model Renderer.ViewModels.ExtendedContentBlockViewModel

    <sf-wrapper tag-name="@Model.TagName" class="@Model.WrapperCssClass clearfix">
        <h1>Original</h1>
        @{
            @Html.HtmlSanitize(@Model.Content)
        }

        <h1>Modified</h1>
        @{
            @Html.HtmlSanitize(@Model.ModifiedContent)
        }
    </sf-wrapper>