Blog.Url should be displayed instead of Blog ID in the Delete view as well:

    <dl class="dl-horizontal">
      ...
      <dd>
         @Html.DisplayFor(model => model.Blog.Url)
      </dd>
    </dl>

 The changes were reflected on the Delete confirmation screen that now displays the Blog URL instead of the Blog ID:

The Post list page doesn't display the deleted item, which ensures that the data has been deleted from the table:

We have identified certain missing pieces of the puzzle in the CRUD operations that were covered in Chapter 1, Kickstart - Introduction to Entity Framework Core because there is no specific change that needs to be addressed in the database-first approach.