public void DeleteByIndex(int index)
{
CheckBounds(index);
DoubleNode crnt = FindDoubleNode(index);
crnt.Detach();
Length--;
}
public void DeleteAllByValue(int value)
{
for (DoubleNode n = _root.Next; n != _root; n = n.Next)
{
if (value == n.Value)
{
n.Detach();
Length--;
}
}
}