c# - WPF open new window on another thread -

in code below, call method opens custom new window. when application doing long running task wish still able activate window. possible on thread or using task class?

public static class customw {     static custom_window_chrome_demo.themedwindow msgbox(string msgbx_ttl, string msgbx_contnt)     {         var w_mbx = new custom_window_chrome_demo.themedwindow();         w_mbx.width = 950; w_mbx.height = 159;         w_mbx.title = msgbx_ttl;          grid g = new grid();         stackpanel spm = new stackpanel();         textblock tblckerrmsg = new textblock();        //more settings......     }  } 

this how tried invoke it,

public void newmsgboxshow(string msgbx_ttl, string msgbx_contnt) {     system.threading.thread s = new system.threading.thread(         ()=>         customw.msgbox(msgbx_ttl, msgbx_contnt).show()        ); } 

but when using new thread getting following error.

the calling thread must sta, because many ui components require this

what correct way achieve required result ?

use this:

 task.factory.startnew(new action(() =>             {                 //your window code             }), cancellationtoken.none, taskcreationoptions.none, taskscheduler.fromcurrentsynchronizationcontext()); 

when new thread created current synchronization context able update ui.(when current thread ui thread)

you can use dispatcher execute code.

 system.windows.application.current.dispatcher.begininvoke(new action(()=>             {                 //your window code             }));