Uses of Salt in encrypting the Password using c# [Resolved]

public class MyClass{



  private static string salt = "Cool";





public static string GenerateLicense(string systemId)

        {

            string license = string.Empty;

          

            systemId = salt + systemId;

            license = Cryptography.Encrypt(systemId);

            return license;

        }



        public static bool ValidateLicense(string licenseKey)

        {





            bool validLicense = false;

            string key = string.Empty;



            try

            {

                string license = Cryptography.Decrypt(licenseKey);

                key = salt + Key();



                if (key == license)

                {

                    validLicense = true;

                }

            }

            catch (Exception)

            {

                validLicense = false;           

            }



          



            return validLicense;

        }

}

public  class Cryptography

    {

    



        static byte[] bytes = ASCIIEncoding.ASCII.GetBytes("ZeroCool");

        /// <summary>

        /// Encrypt a string.

        /// </summary>

        /// <param name="originalString">The original string.</param>

        /// <returns>The encrypted string.</returns>

        /// <exception cref="ArgumentNullException">This exception will be thrown when the original string is null or empty.</exception>

        public static string Encrypt(string originalString)

        {

            if (String.IsNullOrEmpty(originalString))

            {

                throw new ArgumentNullException("The string which needs to be encrypted can not be null.");

            }



            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

            MemoryStream memoryStream = new MemoryStream();

            CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateEncryptor(bytes, bytes), CryptoStreamMode.Write);



            StreamWriter writer = new StreamWriter(cryptoStream);

            writer.Write(originalString);

            writer.Flush();

            cryptoStream.FlushFinalBlock();

            writer.Flush();



            return Convert.ToBase64String(memoryStream.GetBuffer(), 0, (int)memoryStream.Length);

        }



        /// <summary>

        /// Decrypt a crypted string.

        /// </summary>

        /// <param name="cryptedString">The crypted string.</param>

        /// <returns>The decrypted string.</returns>

        /// <exception cref="ArgumentNullException">This exception will be thrown when the crypted string is null or empty.</exception>

        public static string Decrypt(string cryptedString)

        {

            if (String.IsNullOrEmpty(cryptedString))

            {

                throw new ArgumentNullException("The string which needs to be decrypted can not be null.");

            }



            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

            MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(cryptedString));

            CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);

            StreamReader reader = new StreamReader(cryptoStream);



            return reader.ReadToEnd();

        }

    }