C#

Britt Adams wrote:

using Dynamic Data and Entities for managing usernames, passwords, resources and such.

Britt Adams wrote:

database encrypted and when the data is loaded decrypt it

public class EncryptDecryptClass
    {
        public static string Encrypt(string valueToEncrypt)
        {
            byte[] byteArray = System.Text.ASCIIEncoding.ASCII.GetBytes(valueToEncrypt);

            string encryptedString = Convert.ToBase64String(byteArray);

            return encryptedString;

        }

        public static string DecryptString(string encryptedString)
        {
            byte[] byteArray = Convert.FromBase64String(encryptedString);
            string decryptedString = System.Text.ASCIIEncoding.ASCII.GetString(byteArray);
            return decryptedString;
        }

    }

Britt Adams wrote:

Your code was much simpler.

jasome wrote:

a setup can be used only once, when the person try to run it again then it shoud not work.

class App {
  internal void Run() {
    String[] tests = new String[] {"aAa!", "aardvark", "Aardvark", "AARDVARK",
      "0123456789", "0123456789a"};
    foreach (String s in tests) {
      TestRegex(s);
    }
  }

  private static void TestRegex(String test) {
    String expr = "[^A-Z0-9]+"; // one or more match of any char except
    Regex rgxTest = new Regex(expr);
    Boolean result = !rgxTest.IsMatch(test);  // invert the result
    Console.WriteLine("String {0}\nExpr {1}\nResult {2}\n", test, expr, result);
  }