Average() [8/10]

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

inlinestatic

Definition at line 3729 of file Enumerable.cs.

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

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