C#: How-to open a file using its default application.

Here is a code sample for opening a file by the default application in your OS.

string folder = AppDomain.CurrentDomain.BaseDirectory;
string pdf = "an_arcobat_pdf_file.pdf";
System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo();
psi.FileName = pdf;
psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Maximized;
System.Diagnostics.Process.Start(psi);