Merge two pdf files using itextsharp

using iTextSharp.text;

using iTextSharp.text.pdf;

using System.IO;

using System.Collections;

static void Main(string[] args)

        {

            String[] files = @"file1.pdf,file2.pdf".Split(',');

            MergeFiles(@"file1.pdf", files);

        }

        public static void MergeFiles(string destinationFile, string[] sourceFiles)

        {

            try

            {

                using (MemoryStream ms = new MemoryStream())

                {    

                    PdfCopyFields copy = new PdfCopyFields(ms);  

                    copy.Writer.ViewerPreferences = PdfWriter.PageModeUseOutlines;

                    ArrayList outlines = new ArrayList();

                    int pageOffset = 0;

                    int f = 0;

                   

                    while (f < sourceFiles.Length)

                    {                 

                        string file = sourceFiles[f];

                        PdfReader reader = new PdfReader(file);                     

                        copy.AddDocument(reader);                      

                        pageOffset += reader.NumberOfPages;

                        f++;

                    }                  

                    copy.Close();

                    MemoryStreamToFile(ms, destinationFile);

                }

            }

            catch (System.Exception e)

            {

                System.Console.Error.WriteLine(e.Message);

                System.Console.Error.WriteLine(e.StackTrace);

                System.Console.ReadLine();

            }

        }

        public static void MemoryStreamToFile(MemoryStream MS, string FileName)

        {

            using (FileStream fs = new FileStream(@FileName, FileMode.Create))

            {

                byte[] data = MS.ToArray();

                fs.Write(data, 0, data.Length);

                fs.Close();

            }

  }