title: I don't understand how email activation works
body: <p>I want to verify that the user email is valid and turn this email into his id in my system.
  Yet I don't know how to make a link in the mail, that activates the account like(facebook and others
  ) and I don't really understand what happens when the link is selected.</p>
  
  <p>I thought of generating a key like "sdklbsdgk4493" to enter once- so that guessing is hard, yet for many people copy and paste is not trivial and I may annoy them with this solution.</p>
  
  <p>Any thoughts or ideas?</p>
  
  <p>p.s: I'm working in c# so if it can be done with c#... it will be great :)</p>
  
  <p>Thanks Asaf</p>