ForEach Extension Method

AutomaticIterator.cs

public static class AutomaticIterator
{
    public static void ForEach<T>(this IEnumerable<T> iterable, Action<T> action)
    {
        var iterator = iterable.GetEnumerator();
        using (iterator)
        {
            while (iterator.MoveNext())
            {
                action(iterator.Current);
            }
        }
    }
}
...
var collection = new[] { 10, 20, 30 };
collection.ForEach(Console.WriteLine);