title: Adding multiple data to cookie
body: <p>I'm trying to put multiple data into a cookie using a button.<br>
  The cookie will be used as a shopping cart and on the buttonclick will receive an idnumber of a product.<br>
  Everytime I click a second button, it doesn't add the idnumber of that button to the cookie.</p>
  
  <pre><code>protected void Button1_Click(object sender, EventArgs e)
  {
      Request.Cookies["MyTestCookie"].Values.Add("", "3");
      Response.Write(Request.Cookies["MyTestCookie"].Values.ToString());
  }
  </code></pre>
  
  <p><b>EDIT</b><br>
  I'm sorry, I just reread and saw I explained wrong.<br>
  I want to add 1 string of data per button.(Button1 gives value 3, Button2 gives value 4 etc)<br>
  I've made multiple buttons like this one, but they overwrite eachother when adding into the cookie.</p>