Configurations and Program features in Visual Studio/C# Windows App

#ifdef PROVERSION
part1.disable();
part2.disable();
#endif

enum LicenseLevel {
  Eval = 0,
  Pro = 1,
  Enterprise = 2
}

// later...

for(i=0; i < widgets.Count; i++) {
  if (i == 100 && CurrentUser.LicenseLevel < LicenseLevel.Enterprise)
    break;
  // do stuff
}