title: custom error page for virto commerce storefront
body: <p>in customErrors for virto commerce storefront, exist defaultRedirect="~/ServerMaintenance.aspx".
   so in statusCode="500" show ServerMaintenance.
  but in statusCode="500" i need to show C500.aspx
  I change webconfig to</p>
  
  <pre><code>&lt;customErrors mode="On" redirectMode="ResponseRewrite" defaultRedirect="~/ServerMaintenance.aspx"&gt;
  &lt;error statusCode="500" redirect="~/Status/C500.aspx"/&gt;
  &lt;/customErrors&gt;
  </code></pre>
  
  <p>But in statusCode="500" do not show C500.aspx, and show And shows  page with following error :</p>
  
  <pre><code>Server Error in '/' Application.
  
  Runtime Error
  
  Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated. 
  </code></pre>
  
  <p>Where is my mistake ?</p>