/ Open the source PDF document by initializing an instance of Document class
Document pdfDocument = new Document( "sample.pdf");
// Create an instance of DocSaveOptions class to access save options for export to Doc format 
DocSaveOptions saveOptions = new DocSaveOptions
{
    // Set the value of this Format property to save the output file in Doc format.
    Format = DocSaveOptions.DocFormat.Doc,
    // Set the recognition mode as Flow by setting the Mode property 
    Mode = DocSaveOptions.RecognitionMode.Flow,
    // Assign a value to the RelativeHorizontalProximity property Set the Horizontal proximity as 2.5 
    RelativeHorizontalProximity = 2.5f,
    // Enable the value to recognize bullets during conversion process by setting a value of RecognizeBullets property  
    RecognizeBullets = true
};
// Invoke the Save method to save the file into MS document format 
pdfDocument.Save( "PDFToDOC_out.doc", saveOptions);