public static PerpetualEnumerator<T> GetPerpetualEnumerator<T>(this IEnumerable<T> items)
{
    return new PerpetualEnumerator<T>(items);
}

using System.Collections;
using System.Collections.Generic;
 
namespace nl4net
{
    /// <summary>
    /// Wraps a standard IEnumerator&lt;T&gt; to provide
    /// iteration over a generic collection that automatically 
    /// resets to the beginning once it reaches the end.
    /// </summary>