Entity Framework Core HasOne如何建立表字段之间的关系

public class Blog
{
public int BlogId { get; set; }
public string Url { get; set; }

public List<Post> Posts { get; set; }
}

public class Post
{
public int PostId { get; set; }
public string Title { get; set; }
public string Content { get; set; }

public Blog Blog { get; set; }
}

modelBuilder.Entity<Post>()
.HasOne(p => p.Blog)
.WithMany(b => b.Posts);