Question

Is there a one line LINQ statement that would replace the foreach loop in the code below?

public static ReplaceItemsOnOrder(Order order, List<OrderItem> replacements)
{
    order.Items.Clear();
    foreach (var item in replacements)
    {
        order.Items.Add(item);
    }
}

EDIT:

Here is a simplified definition for the Order class:

public class Order
{
    private Collection<OrderItem> _items = new Collection<OrderItem>();
    public Collection<OrderItem> Items
    {
        get { return _items; }
    }
}

Answer 1

No, Linq is about selecting, not modifying.

You could write your own extension method to add this feature though.