using static System.Console;

namespace CallStackExceptionHandlingLib
{
  public class Calculator
  {
    public static void Gamma() // public so it can be called from outside
    {
      WriteLine("In Gamma");
      Delta();
    }

    private static void Delta() // private so it can only be called internally
    {
      WriteLine("In Delta");
      File.OpenText("bad file path");
    }
  }
}