/// <summary>
/// Constructor that creates a cons cell with an element
/// (head) and a reference to the rest of the list (tail)
/// </summary>
/// <param name="head">The elemnet stored by the cons cell</param>
/// <param name="tail">Reference to the rest of the list</param>
public FuncList(T head, FuncList <T> tail)
{
IsEmpty = false;
Head = head;
Tail = tail;
}