// Create a document.

    using( var document = DocX.Create( "InsertBookmarks.docx" ) )

    {

      // Insert a bookmark in the document.

      document.InsertBookmark( "Bookmark1" );

      // Add a paragraph.

      var p = document.InsertParagraph( "This document contains a bookmark named \"" );

      p.Append( document.Bookmarks.First().Name );

      p.Append( "\" just before this line." );        

      // Save the document.

      document.Save();

    }