Feb 22, 2019 12:41 PM|PatriceSc|LINK
You likely can't. Passwords are "hashed" rather than "encrypted". That is from the clear text password input, an output value is computed from which you are not supposed to be able to retrieve the input value.
When a user logs, the provided password is hashed again and the output is compared to see if it matches the hashed value found in the db.
It allows to verify passwords but store them using a illegible format (and the salt is designed to make retrieving the original value even harder).
What are you trying to do ? ASP.NET offers the needed support out of the box to handle that properly (for example to hash a provided password and check if it is valid).