How To Decrypt Password, Encrypted By MDI?

with your kind support and using this code:

'Encrypt the password
Dim md5Hasher as New MD5CryptoServiceProvider()

Dim hashedBytes as Byte()
Dim encoder as New UTF8Encoding()

hashedBytes = md5Hasher.ComputeHash(encoder.GetBytes(txtPwd.Text))

Dim paramPwd as SqlParameter
paramPwd = New SqlParameter("@Password", SqlDbType.Binary, 16)
paramPwd.Value = hashedBytes
objCmd.Parameters.Add(paramPwd)

I have been able to Encrypt my password, but now I am struggling to Decrypt it and i need your suggestions again. Now how i can Decrypt the password that is stored in my DB as binary form.