C# Extensions to update ObservableCollection itens without remove and reinsert.

ObservableCollectionHelpers.cs

public static class ObservableCollectionHelpers
{
    public static void Replace<T>(this ObservableCollection<T> collection, IEnumerable<T> novosItens)
    {
        ArgumentNullException.ThrowIfNull(collection);
        ArgumentNullException.ThrowIfNull(novosItens);

        var numeroColunasColecao = collection.Count;
        var numeroColunasNovosItens = novosItens.Count();

        for ( var i = 0; i < numeroColunasNovosItens; i++)
        {
            if (i < numeroColunasColecao)
                collection[i] = novosItens.ElementAt(i);
            else
                collection.Add(novosItens.ElementAt(i));
        }

        for (var i = numeroColunasColecao - 1; i >= numeroColunasNovosItens; i--)
            collection.RemoveAt(i);
    }
}