public T RemoveFirst()
{
if (this.Count == 0)
{
throw new InvalidOperationException("List is empty!");
}
T removedElement = this.head.Value;
if (this.Count == 1)
{
this.head = null;
this.tail = null;
}
else
{
ListNode <T> newHead = this.head.NextNode;
newHead.PreviousNode = null;
this.head = newHead;
}
this.Count--;
return(removedElement);
}
public T RemoveLast()
{
//има ли head дай ми валю, ако няма head върни ми null в променливата
if (this.Count == 0)
{
throw new InvalidOperationException("List is empty!");
}
T removedElement = this.tail.Value;
if (this.Count == 1)
{
this.head = null;
this.tail = null;
}
else
{
ListNode <T> newTail = this.tail.PreviousNode;
newTail.NextNode = null;
this.tail = newTail;
}
this.Count--;
return(removedElement);
}
