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Created February 14, 2012 10:27
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Ways of handling null collections and AddRange
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gistfile1.cs
// a)
if (items != null)
collection.AddRange(items)
// b)
collection.AddRange(items ?? new Foo[0])
@leniel
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leniel commented Mar 19, 2014

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);
    }
}

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

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