Split HTML Webpage into Multiple Files Programmatically using C#

Split-HTML-file.cs

String content = File.ReadAllText(dataDir1 + "Product.html");
// Create an instance of HTML document
var document = new HTMLDocument(content, "");
            
// Split HTML webpage to multiple files
// find all paragraph elements inside document by using CSS Selector Query
var elements = document.QuerySelectorAll("p");
for (int i = 0; i < elements.Length; i++)
{
    // create an empty document to export content
    using (var copyTo = new HTMLDocument())
    {
        // append the content into the earlier created document
        copyTo.DocumentElement.AppendChild(elements[i]);
        // save the document
        copyTo.Save(dataDir1 + "doc_" + i + ".html", HTMLSaveFormat.HTML);
    }
}