// For complete examples and data files, please go to https://github.com/aspose-words/Aspose.Words-for-.NET.git.
Document docA = new Document();            
DocumentBuilder builder = new DocumentBuilder(docA);

// Insert text to the document start.
builder.MoveToDocumentStart();
builder.Write("First Hello World paragraph");

Document docB = new Document(MyDir + "Document.docx");
// Add document B to the and of document A, preserving document B formatting.
docA.AppendDocument(docB, ImportFormatMode.KeepSourceFormatting);
            
docA.Save(ArtifactsDir + "HelloWorld.SimpleHelloWorld.pdf");