/// <summary>
///
/// </summary>
/// <param name="head"></param>
/// <param name="tail"></param>
public SinglyLinked(T head, SinglyLinked <T> tail)
{
ThrowWhen(head, IsNullOrDefault, nameof(head));
Head = head;
Tail = tail;
}
public static SinglyLinked <T> ToSinglyLinked <T>(this T[] source) => SinglyLinked <T> .FromArray(source, 0, source.Length);