How to update Uploaded File using C#.net Window application

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C#3.5

Hi,
I am creating C#.Net Window application in visual studio 2008 and sqlserver 2005.

How to Update Uploaded file. In my application file uploading successfully.
but problem is during Update time.
I am using this code;

string path = "";
for (int i = 0; i < lstFilePaths.Items.Count; i++)
   {
   if (lstFilePaths.Items.Count > 0)
      {
      string fpath = Application.StartupPath + "\\UPLOAD";
      if (Directory.Exists(fpath) != true)
         {
         Directory.CreateDirectory(fpath);
         }
      FileInfo fInfo = new FileInfo(fpath);
      string s = lstFilePaths.Text;
      string s1 = lstFilePaths.Items[i].ToString();
      string[] ar = s1.Split('\\');
      Int32 cnt = ar.Length;
      path1 = Application.StartupPath + "\\UPLOAD\\" + ar[cnt - 1].ToString();
      if (File.Exists(path1))
         {
         File.Delete(path1);
         }
      path += " ," + path1;
      File.Copy(s1, path1, true); // Here Error Occurred
      }

then I am Writing query.. of update using stored procedure.....
Hope For The favorable response.
Thanks In Advance

[edit]Indentation added to code fragment - OriginalGriff[/edit]