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

            System.Console.Write("MASUKKAN ALAMAT BARU : ");
            string Alamat = System.Console.ReadLine();

            System.Console.Write("MASUKKAN EMAIL BARU  : ");
            string Email = System.Console.ReadLine();

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

            var getmhs = mhs_context.MAHASISWAs.Find(Convert.ToInt16(id_mhs));

            if (getmhs == null)
            {
                System.Console.Write("TIDAK ADA ID MAHASISWA : " + id_mhs);
            }
            else
            {
                MAHASISWA mahasiswa = GetById(input);
                mahasiswa.NAME    = Nama;
                mahasiswa.ADDRESS = Alamat;
                mahasiswa.EMAIL   = Email;

                mhs_context.Entry(mahasiswa).State = System.Data.Entity.EntityState.Modified;
                mhs_context.SaveChanges();
            }
            return(input);
        }
        // =========================================== INSERT =============================================
        public void InsertMHS()
        {
            Console.Clear();
            System.Console.Write("Nama Mahasiswa : ");
            string Nama_Mahasiswa = System.Console.ReadLine();

            System.Console.Write("Alamat Mahasiswa : ");
            string Alamat_Mahasiswa = System.Console.ReadLine();

            System.Console.Write("Email : ");
            string email = System.Console.ReadLine();

            MAHASISWA call = new MAHASISWA();

            {
                call.NAME    = Nama_Mahasiswa;
                call.ADDRESS = Alamat_Mahasiswa;
                call.EMAIL   = email;
            };
            try
            {
                mhs_context.MAHASISWAs.Add(call);
                var result = mhs_context.SaveChanges();
            }
            catch (Exception ex)
            {
                System.Console.Write(ex.InnerException);
            }
        }