1using System;
 2using System.Collections.Generic;
 3using System.Linq;
 4
 5namespace common
 6{
 7    static public class Iterating
 8    {
 9        static public void each<T>(this IEnumerable<T> items, Action<T> action)
10        {
11            foreach (var item in items ?? Enumerable.Empty<T>()) action(item);
12        }
13    }
14}