Decryption of string in VB.Net

'This class is responsible for decripting valuable data
'Call this method with parameters your data and key "NAPENCPT"

Public Class Encryption

'Decrypts data

Public Shared Function Decrypt(ByVal text As String, ByVal key As String) As String

            Dim ms As MemoryStream = New MemoryStream

            Try
                Dim encodedkey() As Byte
                Dim iv() As Byte = {&H12, &H34, &H56, &H78, &H90, &HAB, &HCD, &HEF}

                Dim bytes() As Byte

                encodedkey = Encoding.UTF8.GetBytes(key)

                Dim csp As DESCryptoServiceProvider = New DESCryptoServiceProvider

                bytes = Convert.FromBase64String(text)

                Dim cs As CryptoStream = New CryptoStream(ms, csp.CreateDecryptor(encodedkey, iv), CryptoStreamMode.Write)

                cs.Write(bytes, 0, bytes.Length)
                cs.FlushFinalBlock()

            Catch ex As Exception
                Return String.Empty
            End Try

            Return Encoding.UTF8.GetString(ms.ToArray)

        End Function

End Class