GetChildNodes

public NodeCollection GetChildNodes(NodeType nodeType, bool isDeep)

Document doc = new Document(MyDir + "Comments.docx");

NodeCollection comments = doc.GetChildNodes(NodeType.Comment, true);
// If a comment has no ancestor, it is a "top-level" comment as opposed to a reply-type comment.
// Print all top-level comments along with any replies they may have.
foreach (Comment comment in comments.OfType<Comment>().Where(c => c.Ancestor == null))
{
    Console.WriteLine("Top-level comment:");
    Console.WriteLine($"\t\"{comment.GetText().Trim()}\", by {comment.Author}");
    Console.WriteLine($"Has {comment.Replies.Count} replies");
    foreach (Comment commentReply in comment.Replies)
    {
        Console.WriteLine($"\t\"{commentReply.GetText().Trim()}\", by {commentReply.Author}");
    }
    Console.WriteLine();
}

Document doc = new Document(MyDir + "Images.docx");

// Get the collection of shapes from the document,
// and save the image data of every shape with an image as a file to the local file system.
NodeCollection shapes = doc.GetChildNodes(NodeType.Shape, true);

Assert.AreEqual(9, shapes.Count(s => ((Shape)s).HasImage));

int imageIndex = 0;
foreach (Shape shape in shapes.OfType<Shape>())
{
    if (shape.HasImage)
    {
        // The image data of shapes may contain images of many possible image formats. 
        // We can determine a file extension for each image automatically, based on its format.
        string imageFileName =
            $"File.ExtractImages.{imageIndex}{FileFormatUtil.ImageTypeToExtension(shape.ImageData.ImageType)}";
        shape.ImageData.Save(ArtifactsDir + imageFileName);
        imageIndex++;
    }
}

Document doc = new Document();

// Add two runs and one shape as child nodes to the first paragraph of this document.
Paragraph paragraph = (Paragraph)doc.GetChild(NodeType.Paragraph, 0, true);
paragraph.AppendChild(new Run(doc, "Hello world! "));

Shape shape = new Shape(doc, ShapeType.Rectangle);
shape.Width = 200;
shape.Height = 200;
// Note that the 'CustomNodeId' is not saved to an output file and exists only during the node lifetime.
shape.CustomNodeId = 100;
shape.WrapType = WrapType.Inline;
paragraph.AppendChild(shape);

paragraph.AppendChild(new Run(doc, "Hello again!"));

// Iterate through the paragraph's collection of immediate children,
// and print any runs or shapes that we find within.
NodeCollection children = paragraph.GetChildNodes(NodeType.Any, false);

Assert.AreEqual(3, paragraph.GetChildNodes(NodeType.Any, false).Count);

foreach (Node child in children)
    switch (child.NodeType)
    {
        case NodeType.Run:
            Console.WriteLine("Run contents:");
            Console.WriteLine($"\t\"{child.GetText().Trim()}\"");
            break;
        case NodeType.Shape:
            Shape childShape = (Shape)child;
            Console.WriteLine("Shape:");
            Console.WriteLine($"\t{childShape.ShapeType}, {childShape.Width}x{childShape.Height}");
            break;
    }

Document doc = new Document();

// An empty document, by default, has one paragraph.
Assert.AreEqual(1, doc.FirstSection.Body.Paragraphs.Count);

// Composite nodes such as our paragraph can contain other composite and inline nodes as children.
Paragraph paragraph = doc.FirstSection.Body.FirstParagraph;
Run paragraphText = new Run(doc, "Initial text. ");
paragraph.AppendChild(paragraphText);

// Create three more run nodes.
Run run1 = new Run(doc, "Run 1. ");
Run run2 = new Run(doc, "Run 2. ");
Run run3 = new Run(doc, "Run 3. ");

// The document body will not display these runs until we insert them into a composite node
// that itself is a part of the document's node tree, as we did with the first run.
// We can determine where the text contents of nodes that we insert
// appears in the document by specifying an insertion location relative to another node in the paragraph.
Assert.AreEqual("Initial text.", paragraph.GetText().Trim());

// Insert the second run into the paragraph in front of the initial run.
paragraph.InsertBefore(run2, paragraphText);

Assert.AreEqual("Run 2. Initial text.", paragraph.GetText().Trim());

// Insert the third run after the initial run.
paragraph.InsertAfter(run3, paragraphText);

Assert.AreEqual("Run 2. Initial text. Run 3.", paragraph.GetText().Trim());

// Insert the first run to the start of the paragraph's child nodes collection.
paragraph.PrependChild(run1);

Assert.AreEqual("Run 1. Run 2. Initial text. Run 3.", paragraph.GetText().Trim());
Assert.AreEqual(4, paragraph.GetChildNodes(NodeType.Any, true).Count);

// We can modify the contents of the run by editing and deleting existing child nodes.
((Run)paragraph.GetChildNodes(NodeType.Run, true)[1]).Text = "Updated run 2. ";
paragraph.GetChildNodes(NodeType.Run, true).Remove(paragraphText);

Assert.AreEqual("Run 1. Updated run 2. Run 3.", paragraph.GetText().Trim());
Assert.AreEqual(3, paragraph.GetChildNodes(NodeType.Any, true).Count);