Ways of handling null collections and AddRange

gistfile1.cs

// a)
if (items != null)
  collection.AddRange(items)

// b)
collection.AddRange(items ?? new Foo[0])

@robashton I think that should be collection.NullSafeAddRange(items)?

Just use Rob's extension method...nice and clean...and what I use on "real" projects ;)

@jagregory collection.CheckIfThisIsNullAndIfThisIsNotAddTheItemsInTheCollectionToMe(items); [Something Neil might write ;) ]

@jagregory I don't like it, not enough job security

Small correction to @robashton's extension because ICollection doesn't have AddRange:

using System.Collections.Generic;

public static class IEnumerableExtensions
{
    public static void AddTo<T>(this IEnumerable<T> self, List<T> destination)
    {
        if(self != null) destination.AddRange(self);
    }
}

@leniel How do you call this extension method on self if self is null? It seems like it would cause some exception))