How to read file and dispose streamReader object?

Question

I am writing program which reads data from csv file when file update. Now i got simple error as shown following. i.e OnChanged event fires two or more times i want to execute it one time when file update. 

 

public void GetData()

{

try

{

//for (int i = 0; i >= 0; i++)

//{

FileSystemWatcher watcher = new FileSystemWatcher();

watcher.Path = filepath;

watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite

| NotifyFilters.FileName | NotifyFilters.DirectoryName;

// Only watch text files.

watcher.Filter = "*.csv";

watcher.Changed += new FileSystemEventHandler(OnChanged);

watcher.EnableRaisingEvents = true;

//}

}

catch { }

}

 

 

private void OnChanged(object source, FileSystemEventArgs e)

{

     try

    {

            NetworkStream networkStream = clientSocket.GetStream();

            line = new string[] { };

            using (FileStream fs = new FileStream(e.FullPath, FileMode.Open, FileAccess.Read))

            using (StreamReader sr = new StreamReader(fs))

            {

                  line = sr.ReadLine().Split(',');

                  for (int p = 0; p < line.Length; p++)

                  {

                        b = Encoding.ASCII.GetBytes(line[p]);

                        networkStream.Write(b, 0, b.Length);

                  }

               sr.Close();

               sr.Dispose();

               fs.Flush();

         }

      }

         catch { }

 }