dotnet var bikemodel = new bicyclemodel(); foreach(var spec in preinstitutionalspecifications) { if(bikemodel.specifications.contains(spec)) continue; bikemodel.specifications.add(spec); } var duckappearance = bikemodel.concealfeature("duck", true); if(duckappearance) { console.writeline("your bicycle has been successfully customized with a concealed duck feature for a touch of whimsy, adhering to pre-institutional specifications. ready to recommence your cycling adventures from scratch with this unique addition!"); }