how to stop my FileSystemWatcher in start/stop button - button

Question

I have a FileSystemWatchers monitoring 1 location in a Start/stop Button, but I can´t manage to stop it, the button works pretty much well as when I click on it, it reads the code when it is off (the text changes to "start Watching") but it does not manage to stop monitoring, also I have tried "watcher.EnableRaisingEvents = false;" but it does not work could you please help me??
using System
using System.ComponentModel
using System.Diagnostics
using System.Drawing
using System.IO
using System.Windows.Forms
namespace Watcher
{
public partial class Form1 : Form
{
private bool isWatching
bool on = true
bool togglelight = true
Timer t = new Timer()
public Form1()
{
InitializeComponent()
}
private void button1_Click(object sender, EventArgs e)
{
if (isWatching)
{
stopWatching()
}
else
{
startWatching()
}
}
private void startWatching()
{
isWatching = true
button1.Text = "Stop Watching"
t.Start()
on = false;
var watcher = new FileSystemWatcher(#"C:\location1")
watcher.NotifyFilter = NotifyFilters.CreationTime
| NotifyFilters.CreationTime
| NotifyFilters.FileName
watcher.Changed += OnChanged
watcher.Error += OnError
watcher.Filter = "*.xlsx"
watcher.IncludeSubdirectories = false
watcher.EnableRaisingEvents = true
private void stopWatching()
{
isWatching = false;
button1.Text = "Start Watching"
button1.BackColor = Color.Gray
t.Enabled = false
t.Stop()
on = true
}
private static void OnChanged(object sender, FileSystemEventArgs e)
{
if (e.ChangeType != WatcherChangeTypes.Changed)
{
return
}
Console.WriteLine(DateTime.Now + " tipo de cambio: " +
e.ChangeType + ". " + e.FullPath)
kNime_Bat(#" C:\Users\BAT\Knime_eSTORE.bat")
Console.WriteLine(DateTime.Now + " se proceso correctamente")
}
private static void OnError(object sender, ErrorEventArgs e) =>
PrintException(e.GetException())
private static void PrintException(Exception ex)
{
if (ex != null)
{
Console.WriteLine($"Message: {ex.Message}")
Console.WriteLine("Stacktrace:")
Console.WriteLine(ex.StackTrace)
Console.WriteLine()
PrintException(ex.InnerException)
}
}
private static void kNime_Bat(string ruta_del_archivoBat_knime)
{
try
{
ProcessStartInfo psi = new ProcessStartInfo()
psi.UseShellExecute = false
psi.CreateNoWindow = true
psi.WindowStyle = ProcessWindowStyle.Hidden
psi.FileName = ruta_del_archivoBat_knime
Process.Start(psi)
}
catch (Win32Exception)
{
}
}
private void Form1_Load(object sender, EventArgs e)
{
button1.Text = "Start Watching"
t.Interval = 1000
t.Tick += new EventHandler(t_Tick)
}
private void t_Tick(object sender, EventArgs e)
{
if (togglelight)
{
button1.BackColor = Color.DarkBlue
togglelight = false
}
else
{
button1.BackColor = Color.Gray
togglelight = true
}
}
}
}
I have tried watcher.EnableRaisingEvents = false in Stopwatching event but it seems like if it works in a new instance as it does not stop the watcher, how I know? because after I click on "stop" I make a new change in the watched folder and I get an answer in OnChanged event.