Check whether a process is started or not, if not, then start it in background

StartProcess.cs

Regex regex = new Regex(@"app");
bool found = false;
foreach (var process in Process.GetProcesses())
{
    if (regex.Match(process.ProcessName).Success)
    {
        found = true;
        break;
    }

}
if (!found)
{
    ProcessStartInfo processStartInfo = new ProcessStartInfo("app");
    processStartInfo.CreateNoWindow = true;
    processStartInfo.WindowStyle = ProcessWindowStyle.Hidden;
    Process.Start(processStartInfo);
}