public int UpdateDosen(int input2)
        {
            System.Console.Write("MASUKKAN NAMA BARU     : ");
            string Nama = System.Console.ReadLine();

            System.Console.Write("MASUKKAN ID_MAKUL BARU : ");
            string id_makul = System.Console.ReadLine();

            System.Console.Write("MASUKKAN ULANG ID      : ");
            string id_dsn = System.Console.ReadLine();

            var getdsn = mhs_context.PENGAJARs.Find(Convert.ToInt16(id_dsn));

            if (getdsn == null)
            {
                System.Console.Write("TIDAK ADA ID DOSEN : " + id_dsn);
            }
            else
            {
                PENGAJAR dosen = GetById2(input2);
                dosen.NAME     = Nama;
                dosen.ID_MAKUL = Convert.ToInt16(id_makul);

                mhs_context.Entry(dosen).State = System.Data.Entity.EntityState.Modified;
                mhs_context.SaveChanges();
            }
            return(input2);
        }
        // =========================================== INSERT =============================================

        public void InsertDOSEN()
        {
            Console.Clear();
            System.Console.Write("NAMA DOSEN : ");
            string Nama_DOSEN = System.Console.ReadLine();

            System.Console.Write("ID MAKUL   : ");
            string ID_MAKUL = System.Console.ReadLine();

            PENGAJAR call = new PENGAJAR();

            {
                call.NAME     = Nama_DOSEN;
                call.ID_MAKUL = Convert.ToUInt16(ID_MAKUL);
            };
            try
            {
                mhs_context.PENGAJARs.Add(call);
                var result = mhs_context.SaveChanges();
            }
            catch (Exception ex)
            {
                System.Console.Write(ex.InnerException);
            }
        }