Web Forms :: Decrypt Encrypted Password In Database And Send Forgot Password Email

I am using the below post to encrypt and decrypt the password.

ENCRYPT POST

Now my code is working for Encryption. But now what I want is,

When I am using Forgot passwprd functionality, I want to send the decrypted password to the respective user in the Email.

In my database table the password is saved in the Encrypted format.

I have the code decrypt code from the above mentioned post, the question is where to place in the below code so that it will decrypt it properly

Here is my code:-

protected void btnSubmit_Click(object sender, EventArgs e) {
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString)) {
conn.Open();

[Code] ....