Aspose.PDF can Convert PDF file to DOC or DOCX format. Here is the link:
http://www.aspose.com/.net/pdf-component.aspx
I found the following C#.NET code on their site. Kindly contact their team they can surely help you in this matter.....Thanks
Here is the code...
// Path of input PDF document
String filePath = @"d:\\Source.pdf";
// Instantiate the Document object
Aspose.Pdf.Document document = new Aspose.Pdf.Document(filePath);
// Create DocSaveOptions object
DocSaveOptions saveOptions = new DocSaveOptions();
// Set the recognition mode as Flow
saveOptions.Mode = DocSaveOptions.RecognitionMode.Flow;
// Set the Horizontal proximity as 2.5
saveOptions.RelativeHorizontalProximity = 2.5f;
// Enable the value to recognize bullets during conversion process
saveOptions.RecognizeBullets = true;
// Save the resultant DOC file
document.Save(@"d:\\Resultant.doc", saveOptions);