ITable<T>.DeleteAllOnSubmit() is absent?

Question

As far as I see ITable<T> interface doesn't have DeleteAllOnSubmit() method that exists in ITable interface and in Table<T> class.

I am going to implement on my own something like this:

public static void DeleteAllOnSubmit<T>(this ITable<T> table, IEnumerable<T> entities)
{
    entities.ForEach(entity=>table.DeleteOnSubmit(entity);
}

Question 1: Is there any pitfalls here? If it was so easy Microsoft would implement that thierselves...

Question 2: Why that was not implmemented out-of-the box?

Answer 1

Having a look at the implementation of Table<TEntity>.DeleteAllOnSubmit<TSubEntity>() shows, that there isn't much more going on:

public void DeleteAllOnSubmit<TSubEntity>(IEnumerable<TSubEntity> entities) where TSubEntity: TEntity
{
    if (entities == null)
    {
        throw Error.ArgumentNull("entities");
    }
    this.CheckReadOnly();
    this.context.CheckNotInSubmitChanges();
    this.context.VerifyTrackingEnabled();
    foreach (TEntity local in entities.ToList<TSubEntity>())
    {
        this.DeleteOnSubmit(local);
    }
}

So, I'd say: Your implementation is just fine. BTW: There is no ForEach extension method for IEnumerable<T> .

Answer 2

Alternatively you could implement something to the effect of..

public static void DeleteAllOnSubmit<T>(this ITable<T> table, IEnumerable<T> entities)
{
    table.Context.GetTable<T>().DeleteAllOnSubmit(entities);
}

Just traveling through the ITable<T> to the context specific table and calling its DeleteAllOnSubmit() . That way there isn't the deviation in the way you enumerate and delete all and the way the context does natively.