Decoding of Password in ASP.NET

using System;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;


private static readonly byte[] _key = { 0xA1, 0xF1, 0xA6, 0xBB, 0xA2, 0x5A, 0x37, 0x6F, 0x81, 0x2E, 0x17, 0x41, 0x72, 0x2C, 0x43, 0x27 };
private static readonly byte[] _initVector = { 0xE1, 0xF1, 0xA6, 0xBB, 0xA9, 0x5B, 0x31, 0x2F, 0x81, 0x2E, 0x17, 0x4C, 0xA2, 0x81, 0x53, 0x61 };



private static string Decrypt(string Value)
{
SymmetricAlgorithm mCSP;
ICryptoTransform ct = null;
MemoryStream ms = null;
CryptoStream cs = null;
byte[] byt;
byte[] _result;
mCSP = new RijndaelManaged();
try
{
mCSP.Key = _key;
mCSP.IV = _initVector;
ct = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV);
byt = Convert.FromBase64String(Value);
ms = new MemoryStream();
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
cs.Write(byt, 0, byt.Length);
cs.FlushFinalBlock();
cs.Close();
_result = ms.ToArray();
}
catch
{
_result = null;
}
finally
{
if (ct != null)
ct.Dispose();
if (ms != null)
ms.Dispose();
if (cs != null)
cs.Dispose();
}
return ASCIIEncoding.UTF8.GetString(_result);
}



private static string Encrypt(string Password)
{
if (string.IsNullOrEmpty(Password))
return string.Empty;

byte[] Value = Encoding.UTF8.GetBytes(Password);
SymmetricAlgorithm mCSP = new RijndaelManaged();
mCSP.Key = _key;
mCSP.IV = _initVector;
using (ICryptoTransform ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV))
{
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, ct, CryptoStreamMode.Write))
{
cs.Write(Value, 0, Value.Length);
cs.FlushFinalBlock();
cs.Close();
return Convert.ToBase64String(ms.ToArray());
}
}
}
}


call this

string appPassword = Encrypt(dbPassword);