System.Xml.XPathNodePointer.MoveToFirst C# (CSharp) Method

        internal bool MoveToFirst()
        {
            RealFoliate();
            AssertValid();
            if (_node != null)
            {
                DataRow curRow = null;
                XmlNode parent = null;
                if (_column != null)
                {
                    curRow = Row;
                    parent = _node;
                }
                else
                {
                    parent = _node.ParentNode;
                    if (parent == null)
                        return false;
                    if (!IsFoliated(parent) && (parent is XmlBoundElement))
                        curRow = ((XmlBoundElement)parent).Row;
                }
                //first check with the columns in the row
                if (curRow != null)
                {
                    DataColumn c = NextColumn(curRow, null, false);
                    while (c != null)
                    {
                        if (IsValidChild(_node, c))
                        {
                            MoveTo(_node, c, _doc.IsTextOnly(c));
                            return true;
                        }
                        c = NextColumn(curRow, c, false);
                    }
                }
                //didn't find a valid column or maybe already Foliated, go through its children nodes
                XmlNode n = _doc.SafeFirstChild(parent);
                while (n != null)
                {
                    if (IsValidChild(parent, n))
                    {
                        MoveTo(n);
                        return true;
                    }
                    n = _doc.SafeNextSibling(n);
                }
            }
            return false;
        }