Split List into Sublists with LINQ

Question

Is there any way I can separate a List into several separate lists of SomeObject, using the item index as the delimiter of each s

Answer 1

completely lazy, no counting or copying:

public static class EnumerableExtensions
{

  public static IEnumerable> Split(this IEnumerable source, int len)
  {
     if (len == 0)
        throw new ArgumentNullException();

     var enumer = source.GetEnumerator();
     while (enumer.MoveNext())
     {
        yield return Take(enumer.Current, enumer, len);
     }
  }

  private static IEnumerable Take(T head, IEnumerator tail, int len)
  {
     while (true)
     {
        yield return head;
        if (--len == 0)
           break;
        if (tail.MoveNext())
           head = tail.Current;
        else
           break;
     }
  }
}