public void GetLetter()
        {
            string a = "dasalphabetwechseltstaendig";
            var b = new PrimitiveAlgorithmType<string>("KEYKEYKEYKEYKEYKEYKEYKEYKEY".ToLower());

            IVigenereAlgorythm algorithm = new VigenereAlgorythm();
            algorithm.InitialVector = b;
            var result = algorithm.Encrypt(a);

            Assert.AreEqual("NEQKPNREZOXUOGFCIJDWRKILNME".ToLower(), result);
        }
        public void GetLetter()
        {
            string a = "dasalphabetwechseltstaendig";
            var    b = new PrimitiveAlgorithmType <string>("KEYKEYKEYKEYKEYKEYKEYKEYKEY".ToLower());

            IVigenereAlgorythm algorithm = new VigenereAlgorythm();

            algorithm.InitialVector = b;
            var result = algorithm.Encrypt(a);

            Assert.AreEqual("NEQKPNREZOXUOGFCIJDWRKILNME".ToLower(), result);
        }