Average() [4/10]

static ? double System.Linq.Enumerable.Average ( this IEnumerable< double?> source )

inlinestatic

Definition at line 3897 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        using (IEnumerator<double?> enumerator = source.GetEnumerator())
        {
            while (enumerator.MoveNext())
            {
                double? current = enumerator.Current;
                if (!current.HasValue)
                {
                    continue;
                }
                double num = current.GetValueOrDefault();
                long num2 = 1L;
                while (enumerator.MoveNext())
                {
                    current = enumerator.Current;
                    if (current.HasValue)
                    {
                        num += current.GetValueOrDefault();
                        num2 = checked(num2 + 1);
                    }
                }
                return num / (double)num2;
            }
        }
        return null;
    }

References System.Collections.Generic.Dictionary< TKey, TValue >.GetEnumerator(), System.L, System.Linq.source, and System.Linq.ThrowHelper.ThrowArgumentNullException().