Encrypt and Decrypt Password

https://chandradev819.wordpress.com/2011/04/11/how-to-encrypt-and-decrypt-password-in-asp-net-using-c/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Security;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void btnClick_Click(object sender, EventArgs e)
{

lblmsg.Text = EncryptionTest.Encrypt(txtName.Text);

}
protected void Button1_Click(object sender, EventArgs e)
{

TextBox1.Text = EncryptionTest.Decrypt(lblmsg.Text);

}
}