How to print a Word.Document on both sides in C#?

Question

Quick summary

I am able to print out a Word document in C# using PrintOut() function like so:

        object missing = Type.Missing;
        Word.Application app = new Word.Application();
        Word.Document doc = null;
        object template = @"/path/Template.docx";
        doc = app.Documents.Open(template, ReadOnly: true);
        app.Visible = false;

        // Print here
        doc.PrintOut();

Problem

What I realized is I can't print the document on both pages, if there are 2 pages. The 2 pages print 2 sheets, instead of printing on both sides.

I had a look here: https://docs.microsoft.com/en-us/office/vba/api/Word.Document.PrintOut nowhere it says anything about Printing on Both sides.

Question

What is a good method to print a Word.Document in C# on both sides of paper?

Answer 1

It should be a setting you can change in the physical printer if that doesn't work try calling the PrintOut() method of Microsoft.Office.Interop.Word.Document object with ManualDuplexPrint parameter set to true.