string concatenation problem
<p>Please how this string concatenation taking place?
i am really confuse what is happening why that slash i there and how the double quotes are used</p>

<pre><code>SessionStateItemCollection items = new SessionStateItemCollection();

items["LastName"] = "Wilson";
items["FirstName"] = "Dan";

foreach (string s in items.Keys)
  Response.Write("items[\"" + s + "\"] = " + items[s].ToString() + "&lt;br /&gt;");

//here i am looking for explanation please elaborate me on this please
Response.Write("items[\"" + s + "\"] = " + items[s].ToString() + "&lt;br /&gt;");
</code></pre>
