re-ordering items with linq

gistfile1.cs

private void ReorderItem(Guid itemToMoveID, int newOrder)
{
    var db = new SomeDataContext();

    var selectedItems = (from b in db.SomeItems
                          where b.CategoryId == Category.SelectedCategoryID
                          orderby b.OrderBy ascending
                          select b).ToList();

    SomeItem itemToMove = selectedItems.Find(b => b.ID == itemToMoveID);
    selectedItems.Remove(itemToMove );
    selectedItems.Insert(newOrder, itemToMove );

    int newItemOrder = 0;
    foreach (var e in selectedItems)
    {
        e.OrderBy = newItemOrder ++;
        e.DateModified = DateTime.Now;
    }

    db.SubmitChanges();
    someGrid.Rebind();
}