Average< TSource >() [9/10]

static double System.Linq.Enumerable.Average< TSource > ( this IEnumerable< TSource > source, Func< TSource, long > selector )

inlinestatic

Definition at line 4049 of file Enumerable.cs.

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

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