Start Unit using TestExecute Com on .Net project problem

Actually I'm wondering about is my TE process really killed when I released the com object.
Even in my code, after releasing code I double check that is TE process still live by the code.

public void ForceQuit()
        {
            Process[] currentProcess = Process.GetProcessesByName("TestExecute");
            if (currentProcess.Any(x => x.ProcessName == "TestExecute"))
            {
                try
                {
                    Process.Start("taskkill", "/F /IM TestExecute.exe");

                    currentProcess = Process.GetProcessesByName("TestExecute");
                    while (currentProcess.Any(x => x.ProcessName == "TestExecute"))
                    {
                        currentProcess = Process.GetProcessesByName("TestExecute");
                        //Application.DoEvents();
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Exception : {0}", ex.Message);
                }
            }
        }

As you mentioned above,  it may take more time to clear than the code is allowing, but by this code, it still has the problem.
Are there more processes do I have to wait to be killed except that TestExecute process?