title: why do we use HttpContext.Current?
body: <p>I don't know, why do we use <code>HttpContext.Current</code>?<br />
  In this property I use it for <code>Session</code> but I don't know why! </p>
  
  <pre><code>public static string Name
  {
      get
      {
           if (HttpContext.Current.Session["_n_"] != null)
              return HttpContext.Current.Session["_n_"].ToString();
           else return "";
      }
      set
      {
           HttpContext.Current.Session["_n_"] = value;
      }
  }
  </code></pre>