How to read file and dispose streamReader object?

As far as I know there is no way to avoid the file system watcher from firing multiple events, so I have used work-around to solve this issue.

You can try something like this. It is not foolproof if you have a lot of updates to multiple files. In that case you might have to use a list.

private object lockObject = new object();
private string fileNameInUse = "";
private void OnChanged(object source, FileSystemEventArgs e)
{
    // Blocks the second call from being executed
    lock (lockObject)
    {
        if (fileNameInUse == e.FullPath) // This indicates that the file has already been handled.
        {
            fileNameInUse = "";
            return;
        }
        fileNameInUse = e.FullPath;

       try
       {
           NetworkStream networkStream = clientSocket.GetStream();
           line = new string[] { };
    
           using(FileStream fs = new FileStream(e.FullPath,FileMode.Open,FileAccess.Read))
           using (StreamReader sr = new StreamReader(e.FullPath))
           {
              String [] 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 { }
    }
}

I hope I am wrong and there is a better solution.

[UPDATE]
An alternative solution

private object lockObject = new object();
private void OnChanged(object source, FileSystemEventArgs e)
{
    // Temporary turn off raising new events
    watcher.EnableRaisingEvents = false;
    // Blocks the second call from being executed
    lock (lockObject)
    {
       try
       {
           NetworkStream networkStream = clientSocket.GetStream();
           line = new string[] { };
    
           using(FileStream fs = new FileStream(e.FullPath,FileMode.Open,FileAccess.Read))
           using (StreamReader sr = new StreamReader(e.FullPath))
           {
              String [] 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 (Exception ex)  // It is always a bad idea to hide exceptions
        {
            MessageBox.Show(ex.ToString());
        }
        finally
        {
            // Restore raising events
            watcher.EnableRaisingEvents = true;
        }
    }
}