Question

foreach (Process pro in Process.GetProcesses())
{
    int i = 0;
    if (pro.ProcessName == "notepad")
    {
        i++;
        textBox1.Text = Convert.ToString(i);

    }
}

what this code supposed to do is making textbox1.text, “2” if 2 notepad is running etc., however it doesn’t do anything at all.
I can’t see any problem looking at this code, so I am here.

Answer 1

First, if no notepads is running – you code won’t do anything. Probably it should write 0 to textBox?

I’ll suggest rewriting code like that:

var processes = Process.GetProcesses().Select(p => p.ProcessName).ToList();
int count = processes.Count(name => String.Compare(name, "notepad", StringComparison.OrdinalIgnoreCase) == 0);
textBox1.Text = Convert.ToString(count);

You will have ability to debug easily and see which elements are in your processes list.

Moreover, your process could be “Notepad” not “notepad”. Thus I replaced your equality check with String.Compare call.