how to handle System.ComponentModel.Win32Exception: 'Access is denied' Exception

Question

here is my code:

[STAThread]
    public static void Main()
    {
        Process[] localByName = Process.GetProcessesByName("faceme");
        Process currentProcess = Process.GetCurrentProcess();
        int nProcessID = Process.GetCurrentProcess().Id;

        var runningProcess = (from process in Process.GetProcesses()
                              where
                                process.Id != currentProcess.Id &&
                                process.ProcessName.Equals(
                                  currentProcess.ProcessName,
                                  StringComparison.Ordinal)
                              select process).FirstOrDefault();

            if (runningProcess != null)
            {
                runningProcess.Kill();
            }

        MyApp.App app = new MyApp.App();
        app.InitializeComponent();
        app.Run();
    }

i got this error when i call runningProcess.Kill() method