i need to decrypt my encrypted password using md5 algorithm, can any one help me?

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VB

hi,
i encrypt my password using MD5 algorithm in .net.

Now i decrypt my password using MD5?
this is my code for encryption


MD5 Encryption
***************

Public Shared Function Md5(ByVal strChange As String) As String
'Change the syllable into UTF8 code
Dim pass As Byte() = Encoding.UTF8.GetBytes(strChange)
Dim obj_md5 As New System.Security.Cryptography.MD5CryptoServiceProvider
Dim strPassword As String = BitConverter.ToString(obj_md5.ComputeHash(pass))
Return strPassword
End Function


now i need code for decryption this password?

can body help me out?????????