public string Update(string input)
        {
            System.Console.Write("Tanggal Kembali : ");
            DateTime tgl_kembali = Convert.ToDateTime(System.Console.ReadLine());
            TrPinjam trans       = GetById(input);

            trans.TglKembali = tgl_kembali;
            try
            {
                _context.Entry(trans).State = System.Data.Entity.EntityState.Modified;
                _context.SaveChanges();
                System.Console.WriteLine("Update data berhasil!");
            }
            catch (Exception ex)
            {
                System.Console.Write(ex.InnerException);
            }
            return(input);
        }
        public void Insert()
        {
            System.Console.Write("Kode Transaksi : ");
            string kode_trans = System.Console.ReadLine();

            System.Console.Write("Tanggal Pinjam : ");
            DateTime tgl_pinjam = Convert.ToDateTime(System.Console.ReadLine());

            System.Console.Write("Kode Pelanggan : ");
            string kode_pelanggan = System.Console.ReadLine();

            System.Console.Write("Kode Video : ");
            string kode_video = System.Console.ReadLine();

            System.Console.Write("Lama Pinjam : ");
            int      lama_pinjam = Convert.ToInt16(System.Console.ReadLine());
            TrPinjam trans       = new TrPinjam()
            {
                KdTransaksi = kode_trans,
                TglPinjam   = tgl_pinjam,
                KdPelanggan = kode_pelanggan,
                KdVideo     = kode_video,
                LamaPinjam  = lama_pinjam
            };

            try
            {
                _context.TrPinjams.Add(trans);
                var result = _context.SaveChanges();
                System.Console.WriteLine("Insert data berhasil!");
            }
            catch (Exception ex)
            {
                System.Console.Write(ex.InnerException);
            }
        }