title: Get Query String value containing spaces
body: <p>My url with query string is:</p>
  
  <pre><code>http://testpage.aspx?PHONENUMBER=9991234567&amp;CALLBACK_REASON=1st Attempt - First Contact for FNOL
  </code></pre>
  
  <p>i'm trying to get values as:</p>
  
  <pre><code>PHONENUMBER= (this.Request["PHONENUMBER"] == null) ? "-" : this.Request["PHONENUMBER"];
  
  CALLBACK_REASON = (this.Request["CALLBACK_REASON"] == null) ? string.Empty : this.Request["CALLBACK_REASON"];
  </code></pre>
  
  <p>Here i'm unable to get CALLBACK_REASON values. Any help would be grt.</p>