title: Encryption of a 6 digit number into another 6 digit number in c#
body: <p>I want to encrypt an id and pass to a link..for example</p>
  
  <pre><code>id=196
  encryptedid=345
  randno=234
  encryptedrandno=456
  id=encryptedid+encryptedrandno
  link: id
  so when user clikcs that link at backend 
  id=id-encryptedrandno(which gives us encryptedid)
  id=decrypt(id)
  </code></pre>
  
  <p>Pls tel me this logic
  I am using c# web application</p>