title: Open file read-only
body: <p>In a C# WinForms app, I am using System.IO.Diagnostics.Process.Start(fileName) to open files.  The type of file can be .doc, .docx, .xls, .xlsx, .csv, .pdf, or .txt.</p>
  
  <p>Is there any way to force these files to be opened read-only?</p>