How to check a running .exe program?

Hi Ehtesham,
I find some codes form google and it is controlling "notepad.exe" and it is working correctly. But When I try to check another .exe console program, it is not working. Are there any difference between .exe's?

  public bool IsProcessOpen(string name)
        {
            foreach (Process clsProcess in Process.GetProcesses())
            {
                if (clsProcess.ProcessName.Contains(name))
                {
                    return true;
                }
            }
            return false;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Process thisProc = Process.GetCurrentProcess();

            if (IsProcessOpen("notepad") == false)
            {
                textBox1.Text = "Program starting";
                Process islem = new Process();

                islem.StartInfo.FileName = "C:\\Windows\\system32\\notepad.exe";
                islem.Start();
            }
            else
            {
                textBox1.Text="Program running.";
            }
        }

you can search for process of notepad in running process, to get all running process use the below code

using System.Diagnostics;

Process[] processarray = Process.GetProcesses();
foreach(Process p in processarray)
{
Console.WriteLine("Process: {0} ID: {1}", p.ProcessName, p.Id);
}