Sum() [10/10]

static ? long System.Linq.Enumerable.Sum ( this IEnumerable< long?> source )

inlinestatic

Definition at line 7778 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        long num = 0L;
        foreach (long? item in source)
        {
            if (item.HasValue)
            {
                num = checked(num + item.GetValueOrDefault());
            }
        }
        return num;
    }

References System.item, System.L, System.Linq.source, and System.Linq.ThrowHelper.ThrowArgumentNullException().