private void logoutBtn_Click(object sender, EventArgs e) { AccountWebService.accountPortTypeClient soap = new AccountWebService.accountPortTypeClient(); var logout = soap.logoutAccount(Customer.Nick, Customer.Token, AppAuthority.Authority); if (logout == "1") { } else if (logout == "0") { th = new Thread(openingIndex); th.SetApartmentState(ApartmentState.STA); th.Start(); Application.Exit(); } }