static void Main(string[] args) { //contoh data mahasiswa Mahasiswa mhs = new Mahasiswa(); mhs.npm = "18.11.2296"; mhs.nama = "Kristian Ugahari Dwipa"; mhs.email = "*****@*****.**"; Console.WriteLine("Pilih Format Konversi Data : "); Console.WriteLine("1. Json"); Console.WriteLine("2. XML"); Console.WriteLine("3. Csv\n"); Console.Write("Nomor Format Data[1...3] : "); int nomorFormatData = Convert.ToInt32(Console.ReadLine()); IConvertObject convert; //deklarasi objek konversi if (nomorFormatData == 1) { convert = new ConvertToJson(); } else if (nomorFormatData == 2) { convert = new ConvertToXml(); } else { convert = new ConvertToCsv(); } //konversi objek mhs berdasarkan format yang dipilih convert.Convert(mhs); Console.ReadKey(); }