Split DocX file into separate files by finding keywords as delimitor

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C#

VB

MS-Word

OpenXML

Is there any sample of splitting docx file into multiple files by searching keywords?

for example we have a big word file which has repeating content but with different ID and informations. I would like to split them into separate files.

How can we achieve this in C#?

Separating based on sections or paragraphs is not suitable for our scenario.

I think there is no need to mention that should keep the formatting.

Thanks.

PS: My current code is as following. This code doesnt work properly. The count value which I get inside loop and pass to split seems to be incorrect.

int count = 0;
 	   
	    OpenXmlPowerToolsDocument doc = WmlDocument.FromFileName(TxtSource.Text);
            using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
            using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
            {
                XDocument mainDocument = document.MainDocumentPart.GetXDocument();
                                
                for (int i = 1; i < 1000; i++)
                {

                    IEnumerable<xelement> content = mainDocument.Document.Descendants(W.p).Skip(i).Take(1);
                                           
                        Regex regex = new Regex("Delimiter");
                        count = OpenXmlRegex.Match(content, regex);
                        if (count >0)
                        {
                            count = i;
                            break;
                        }                    
                    
                }


            }

            List<source> documentSource = new List<source> {
                new Source(new WmlDocument(TxtSource.Text), 0, count, true)
            };


            int filenumber = 2;
            string filename = string.Format("{0}test_{1}.docx", Txtdest.Text, filenumber);
            DocumentBuilder.BuildDocument(documentSource, filename);