I want to know where we are supposed to use Node, NodeCollection classes with examples. If there is any document providing the details, it will be much useful.
CompositeNode, Node and NodeCollection are base classes for typed nodes - Section, Table, Paragraph, etc. - and their collections. Some methods return them. E.g. SelectSingleNode, GetChildNodes.
Here is an example of how to iterate through all paragraphs in a document setting their LocalId to another value:
NodeCollection paragraphs = doc.GetChildNodes(NodeType.Paragraph, true);
foreach(Paragraph paragraph in paragraphs)
paragraph.Font.LocaleId = 1030;
To know more read about Aspose.Words object model in online or HTML Help documentation articles: