string vBatFile = Path.GetDirectoryName(Application.ExecutablePath) + "\uninst.bat";
                    using (StreamWriter vStreamWriter = new StreamWriter(vBatFile, false, Encoding.Default))
                    {
                        vStreamWriter.Write(string.Format(
                            ":delrn" +
                            "del "{0}"rn" +
                            "if exist "{0}" goto delrn" +
                            "timeout 10rn" + // timeout added for test. even with this it won't work
                            "rmdir "{1}" /s/qrn",
                            Application.ExecutablePath, Application.StartupPath));
                    }
                        //vStreamWriter.Write(string.Format("rmdir "{0}" /s/q", Application.StartupPath));
                        WinExec(vBatFile, 0);
                    Application.Exit();

vStreamWriter.Write(string.Format("rmdir "{0}" /s/q", Application.StartupPath));