public void RemoveFirst()
{
if (First != null)
{
Count--;
First.List = null;
}
First = First?.Next;
if (First != null)
{
First.Previous.Next = null;
First.Previous = null;
}
}
public void RemoveLast()
{
if (Last != null)
{
Count--;
Last.List = null;
}
Last = Last?.Previous;
if (Last != null)
{
Last.Next.Previous = null;
Last.Next = null;
}
}
public void AddLast(MyLinkedListNode <T> Value)
{
if (Value.List == this)
{
throw new InvalidOperationException();
}
if (Last == null)
{
InicializeFirstElement(Value);
return;
}
Count++;
Value.List = this;
Last.Next = Value;
Value.Previous = Last;
Last = Value;
}
public void Remove(MyLinkedListNode <T> Insert)
{
if (Insert.List != this)
{
throw new ArgumentException();
}
Count--;
Insert.List = null;
if (Insert == Last)
{
Last = Insert.Previous;
}
if (Insert == First)
{
First = Insert.Next;
}
if (Insert.Next == null && Insert.Previous == null)
{
Clear();
}
else if (Insert.Next == null)
{
Insert.Previous.Next = null;
}
else if (Insert.Previous == null)
{
Insert.Next.Previous = null;
}
else
{
Insert.Next.Previous = Insert.Previous;
Insert.Previous.Next = Insert.Next;
}
}
public void AddBefore(MyLinkedListNode <T> Current, MyLinkedListNode <T> Insert)
{
var currPrevious = Current.Previous;
if (Insert.List == this)
{
throw new InvalidOperationException();
}
if (currPrevious == null)
{
AddFirst(Insert);
return;
}
Count++;
Insert.List = this;
Current.Previous = Insert;
Insert.Next = Current;
Insert.Previous = currPrevious;
currPrevious.Next = Insert;
}
public void Reset()
{
Curr = StartPosition;
}
private void InicializeFirstElement(T Value)
{
MyLinkedListNode <T> Insert = new MyLinkedListNode <T>(Value);
InicializeFirstElement(Insert);
}
public void AddBefore(MyLinkedListNode <T> Current, T Value)
{
var Insert = new MyLinkedListNode <T>(Value);
AddBefore(Current, Insert);
}
public void AddLast(T Value)
{
var Insert = new MyLinkedListNode <T>(Value);
AddLast(Insert);
}