/**
* Transfers control to the Error page using Server.Transfer, and displays some error information.
*
* header: The error page header, ex. "Page not found". HTML in the string is not escaped.
* description: A description of the error, ex. "Path /foo/bar.txt not found". HTML in the string is not escaped.
* code: The response code of the page, ex. 404.
*/
public static void transferToError(HttpServerUtility server, HttpContext context, string header, string description, int code) {
context.Items.Clear ();
context.Items ["ErrorPage_title"] = header;
context.Items ["ErrorPage_desc"] = description;
context.Items ["ErrorPage_code"] = code;
server.Transfer ("~/ErrorPage.aspx", false);
}