System.Xml.XmlDataDocument.AddPointer C# (CSharp) Méthode

        internal void AddPointer(IXmlDataVirtualNode pointer)
        {
            Debug.Assert(_pointers.ContainsValue(pointer) == false);
            lock (_pointers)
            {
                _countAddPointer++;
                if (_countAddPointer >= 5)
                {   // 5 is choosed to be small enough to not affect perf, but high enough so we will not scan all the time
                    ArrayList al = new ArrayList();
                    foreach (DictionaryEntry entry in _pointers)
                    {
                        IXmlDataVirtualNode temp = (IXmlDataVirtualNode)(entry.Value);
                        Debug.Assert(temp != null);
                        if (!temp.IsInUse())
                            al.Add(temp);
                    }
                    for (int i = 0; i < al.Count; i++)
                    {
                        _pointers.Remove(al[i]);
                    }
                    _countAddPointer = 0;
                }
                _pointers[pointer] = pointer;
            }
        }

 internal void AddPointer() => _doc.AddPointer(this);