Entity Framework ensure objects get inserted in order

Question

I have a table Rules on my database. I insert rules like:

Rule[] rulesToInsert = // some array of rules to insert

using(var db = new MyEntities())
{
     foreach(var rule in rulesToInsert)
         db.Rules.Add(rule);
     db.SaveChanges();
}

When I retrieve later the rules that I have just added I notice they are in a different order. What is the best way to retrieve them in the order I added them? Should I call db.SaveChanges() every time I add a new rule? Or should I add a new column called SortOrder? Why are the items not being added in the order I added them?

Edit

The id is a guid (string) because one rule can have other rules. In other words I am creating a tree structure. (The rules table has a foreign key to itself). It was crashing when I used the primary key as an integer and it autoincremented so I just used a guid instead. I guess I will add a separate column called sort order.

Answer 1

Tables have no sort order (new rows are not guaranteed to be added to the end or any other place). The only safe way to retrieve rows in any particular order is to have a query with Order by.
So yes you will need to add a SortOrder column.