Decrypte password in C#

Hi,

I have a program that has a login page, I need to get user password, encrypte it and store it in database.

I find a lot of ways to encrypt password with salt; I also have to decrypt the password. It is not for validation, so I CANNOT encrypte the password and compare value that has in database. I need to know the password in plain text.

Any suggestion is appreciated.

thanks!