Itext sharp error New file Path does not exist

Question

Salutations,
 I am new to itextsharp and encountered some issues that did not make much sense when I was tryin to trouble shoot.

First let me begin by saying I am taking over a project from a previous programmer, I cleaned up several errors and was able to narrow it down to this one. I am not sure why I am getting it. I called it using the proper name spaces

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Net.Mail;
using System.Text;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.XPath;
using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.xml;

private static string AppRelativePath = "~/path/2get.pdf";
  private static string AppAbsolutePath = HttpContext.Current.Server.MapPath(AppRelativePath);
  private Ektron.Cms.API.Content.Content cAPI = new Ektron.Cms.API.Content.Content();
  private string GUID = string.Empty;
  public string myGUID { get { return GUID; } set { GUID = value; } }

protected void ProcessApp(object sender, System.Web.UI.WebControls.WizardNavigationEventArgs e)
  {
  Page.Validate();
  if (Page.IsValid)
  {
  string NewFileName = string.Empty;
  char[] charLastName = txtLastName.Text.ToLower().ToCharArray();
 
  foreach (char c in charLastName)
  {
  if (char.IsLetterOrDigit(c))
  {
  NewFileName = string.Concat(NewFileName, c);
  }
  }
 
  int fileMatchCount = 0;
  while (File.Exists(Server.MapPath("~/path/2outputpdf/" + NewFileName + ".pdf")))
  {
  if (NewFileName.EndsWith("(" + fileMatchCount.ToString() + ")"))
  {
  NewFileName = NewFileName.Substring(0, NewFileName.Length - 3);
  fileMatchCount++;
  }
  NewFileName += "(" + fileMatchCount.ToString() + ")";
  }
  NewFileName += ".pdf";
  string NewFilePath = Server.MapPath("~/path/2outputpdf/" + NewFileName);
  } 
 try
  {
  PdfReader reader = new PdfReader(AppAbsolutePath);
  PdfStamper stamper = new PdfStamper(reader, new FileStream(NewFilePath, FileMode.Create));
  AcroFields fields = stamper.AcroFields;








yet i get the error CS0103: The name 'NewFilePath' does not exist in the current context...what is the deal?