public T Pop()
{
if (this.Count == 0)
{
throw new InvalidOperationException();
}
T current = this.top.Value;
this.top = this.top.Next;
this.Count--;
return(current);
}
public void Push(T value)
{
if (this.Count == 0)
{
this.lastPushed = new StackNode <T>(value);
}
else
{
var newLast = new StackNode <T>(value);
newLast.PrevNode = this.lastPushed;
this.lastPushed = newLast;
}
this.Count++;
}
public T[] ToArray()
{
T[] array = new T[this.Count];
StackNode current = this.top;
int index = 0;
while (current != null)
{
array[index++] = current.Value;
current = current.Next;
}
return(array);
}
public T[] ToArray()
{
T[] arr = new T[this.Count];
StackNode stackNode = this.top;
int index = 0;
while (stackNode != null)
{
arr[index++] = stackNode.Value;
stackNode = stackNode.Next;
}
return(arr);
}
public StackNode(T value, StackNode next)
{
this.Value = value;
this.Next = next;
}
public void Push(T element)
{
this.top = new StackNode(element, this.top);
this.Count++;
}
public void Push(T item)
{
this.top = new StackNode(item, this.top);
this.Count++;
}
public void Clear()
{
this.top = null;
Count = 0;
}
