Open a specific page in a PDF file c#

I open a pdf file when my form is loaded with the following code:

Process process = new Process();

ProcessStartInfo startInfo = new ProcessStartInfo();

process.StartInfo = startInfo;

startInfo.FileName = @"F:\STAGE\test.pdf";

process.Start();

This works fine but now I want to open a specific page. For example page number 5 of the document test.pdf? Does any one have an idea? Tried some stuff but dind't work!

Thanks!