从不同进程更新UI失败

I'm trying to put standard output from nmap into WPF window application (textbox exactly). I'm trying to use Dispatcher.Invoke but when nmap process starts everything just freezes. When I tried this in a console application (w/o Invoke), everything worked just fine, I think it's a problem with the Invoke method. Nmap itself is working, and finishing it work, but there is no response in my window.I'm trying to put standard output from nmap int