{ 
    try
    {
        var person = db.Persons.Attach(new Person { Id = id });
        person.State = EntityState.Deleted;
        await db.SaveChangesAsync(); // 1 database call
    }
    catch (DbUpdateConcurrencyException e) 
    { 
        Console.WriteLine(e); 
        // will happen if record no longer exists 
    } 
}