how to remove header from word file by using DocumentFormat

Question

How to remove header part from Selected word file using Document.Format 

I am using .Net Framework 2.0

 

My Code :

 

public void removeheader()

{

string temp_path = txtUpload.Text;

using (DocumentFormat.OpenXml.Packaging.WordprocessingDocument doc = WordprocessingDocument.Open(temp_path, true))

{

var docPart = doc.MainDocumentPart;

// if (docPart.HeaderParts.Count() > 0 )

{

docPart.DeleteParts(docPart.HeaderParts);

Document document = docPart.Document;

var headers = document.Descendants().ToList();

foreach (var header in headers)

{

header.Remove();

}

document.Save();

}

}

}.

 

 

Here DocumentFormat.OpenXml.Packaging.WordprocessingDocument doc = WordprocessingDocument.Open(temp_path, true)

getting Error , how I include related Framework SDK file to remove error ? or any other Suggestion