Haw can I send 2 images to 1 print dialog for printing duplex in C#

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C#5.0

print

im using this code that send only one image to 1 dialog i wan to send 2 image to 1 dialog :

string fileName = @"" + Application.StartupPath + "\\Image\\" + "".ToString() + @"\" + @"\" + 2 + ".jpg";
var p = new Process();
p.StartInfo.FileName = fileName;
p.StartInfo.Verb = "Print";
p.Start();

What I have tried:

string fileName = @"" + Application.StartupPath + "\\Image\\" + "".ToString() + @"\" + @"\" + 2 + ".jpg";
var p = new Process();
p.StartInfo.FileName = fileName;
p.StartInfo.Verb = "Print";
p.Start();