Post History

Disclaimer: I don't work with EF therefore not an expert.
EF is tricky and has a lot of dark magic inside so if you're not sure how it all works best to use good old plain SQL or simple libraries.

-----

I think you see this behaviour because you return old "blog" object, which isn't the same as new "blog" that you wrote to the db.

So I suppose your intention was to return "new" `blog` instead, e.g:

```cs
    static Blog SetupBlog()
    {
        using var context = new BloggingContext();

        var blog = new Blog { Url = "http://blogs.msdn.com/adonet" };
        blog.Posts.Add(new Post { Title = "Hello World", Content = "I wrote an app using EF Core!" });
        context.Add(blog);
        context.SaveChanges();
        // return blog;
        return context.Blogs.First();
    }
```

with this change it prints

```

Initial posts
=============
Hello World: I wrote an app using EF Core!

After editing
=============
Hello World (edited): I wrote an app using EF Core!

After adding a new post
=======================
Hello World (edited): I wrote an app using EF Core!
Goodbye World: Some content
```
-----

Hints:
1. You can track state of entities by using [`ChangeTracker`](https://learn.microsoft.com/en-us/ef/core/change-tracking/debug-views)

```csharp
context.ChangeTracker.DetectChanges();
Console.WriteLine(context.ChangeTracker.DebugView.LongView);
```
2. EF automatically detect changes so you don't have to use "Updates" explicitly