Adding a range of values to an ObservableCollection efficiently

Question

I have an ObservableCollection of items that is bound to a list control in my view.

I have a situation where I need to add a chunk of values to the star

Answer 1

This answer didn't show me the new entries in a DataGrid. This OnCollectionChanged works for me:

public class SilentObservableCollection : ObservableCollection
{
    public void AddRange(IEnumerable enumerable)
    {
        CheckReentrancy();

        int startIndex = Count;

        foreach (var item in enumerable)
            Items.Add(item);

        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, new List(enumerable), startIndex));
        OnPropertyChanged(new PropertyChangedEventArgs("Count"));
        OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
    }
}