Can't play PC building Simulator on Game streaming app

In what way do you mean?

Watch a stream while playing a game or stream the PC game you are playing?

If it's stream the game you are playing, no it's not possible. You can only use the Twitch app on the Xbox to stream Xbox console games.

To watch a stream on the console, it's easy, just launch the app, then log in, and find a stream you want to watch, then start a game on your PC.

As i see the issue has gone to PC building simulator 2 now, i think there might be a problem with the newer games or maybe directx!But i lowerd the graphics settings in overwatch and it seems for now to have solved the issue, but on PC building simulator 2 i also putted meduim graphics settings and i had the same issue.

I am also experiencing Xbox App crash every 30 seconds. My Xbox is connected, I can play a game on my Windows PC, but the app crashes every 30 seconds, I have to keep clicking "Stream" and it's annoying. Then it refers me to "Test" my Streaming connection
and the App says it cant connect to my Xbox, when in fact, I hear my game music playing in the background in the App. Which can't be right.

I have streamed to my Windows PC since the App Launch and never had connection problems.

System and App are both up to date.

i want to play some games at my xbox with my friend,but he is far away from me,can i stream the xbox to my pc and his pc at the same time? or at least only his pc?

Well, not with the Xbox App on your PC. However, if the game (and the speed of your and your friend's internet connection) supports it, you can stream your gameplay to
Mixer.

Mixer has interactive features, where you can share a controller to the Mixer streaming website, and the viewers (including your friend) can then "grab" the shared controller and play the game with you.

Be aware however, that if you stream the game to the PC via the Xbox App, you can't stream to Mixer.

You will have to locally play on your Xbox console, and stream to Mixer for your friend to be able to play with you.

Also be aware, that while Mixer provides low latency streaming, there is still some lag happening, so your friend would be at a disadvantage, playing through the stream. So don't try to play timing sensitive games.

The Xbox app on windows 10 allows you to stream your Xbox to your Windows 10 PC to play on a local internet connection (LAN) with it.

Info on game streaming here:
https://support.xbox.com/en-US/games/game-setup/how-to-use-game-streaming

It is not possible to play xbox 360 games on an android phone or Windows 7 professional. You can't even play them on Windows 10. You CAN play them via streaming to your xbox one that is playing the xbox 360 game and play on your Windows 10 PC though.

The Xbox Live app on your phone is for messages, videos, possibly parties and redeeming codes. That's all that it can do.