WPF App下无法多个窗口按序ShowDialog

原因如下:

http://www.silverlightchina.net/html/study/WPF/2012/0226/14062.html

解决方法:

http://stackoverflow.com/questions/4179758/how-to-detect-that-a-window-has-used-up-its-showdialog-call

最好是使用

  Application.Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;
                       
             var login = new LoginWindow();        
             login.ShowDialog();
             if (null != login.AccountInfo)
             {
                 this.MainWindow = new MainWindow(login.AccountInfo);
                 this.MainWindow.ShowDialog();
             }
             Application.Current.Shutdown();