Timer OnTimedEvent isn't updating my form

[lunchboxtheman]

Can you give the rest of the code, including the Form1 class? What you have here doesn't make sense out of context. You have a constructor called Monitor, which means that this code is inside a class called Monitor, yet you reference a 'Form1' object.

Without knowing what exactly is going on, try the following code to see if it fixes your issue.

private static void OnTimedEvent(object source, ElapsedEventArgs e) 
{
    Console.WriteLine("Worked");
    string text = System.IO.File.ReadAllText(@"G:\Monitor.txt");
    txt_Monitor.Text = text + "/125";
    Console.WriteLine(text);     
}