using System.Diagnostics; using System.Windows; namespace PRSLogikal { /// /// Interaction logic for App.xaml /// public partial class App { protected override void OnStartup(StartupEventArgs e) { string _procName = Process.GetCurrentProcess().ProcessName; Process[] _processes=Process.GetProcessesByName(_procName); if (_processes.Length > 1) Shutdown(0); base.OnStartup(e); } } }