Question

If I have say for example 100,000 rows to insert/update/delete, and this number will grow constantly. Which of the following is the best approach, or does it not make any difference.

The PeopleRepository AddPeople implementation

public void AddPeople(IEnumerable i)
{
    _Database.people.InsertAllOnSubmit(i);
}

The PeopleRepository AddPerson implementation

public void AddPerson(Person p)
{
    _Database.people.InsertOnSubmit(p);
}

The PeopleRepository Save implementation

public void Save()
{
    _Database.SubmitChanges();
}

InsertAllOnSubmit Implementation

PeopleRepository repo = new PeopleRepository();

List<Person> everyone = new List<Person>();

foreach (var p in myObject.GetPeople())
{
    Person person = new Person
    {
        person.Name = p.Name
    };

    everyone.Add(person);
}

repo.AddPeople(everyone);
repo.Save();

InsertOnSubmit Implementation

PeopleRepository repo = new PeopleRepository();

foreach (var p in myObject.GetPeople())
{
    Person person = new Person
    {
        person.Name = p.Name
    };

    repo.AddPerson(person);
    repo.Save();
}

Answer 1

If you have such large amounts of changes, you might consider expressing the change in a single SQL UPDATE or INSERT statement.