my war with xamarin (visual studio C#)

[bugsi]

here are the things that simply don't work or don't have a walkthrough or raises errors
in xamarin :

1. the emulator, yes it is possible to lunch apps on the smartphone but the emulator doesn't work
2. get news feed
3. wearable apps
4. get the image capture or screen capture in realtime and fast many times automatically without the user
   pressing anything
5. get volume level
6. openGL apps nothing works, it is impossible to create game apps
7. smart TV apps
8. create a native app chat
9. phone recorder while app is closed : autosave, playback, delete
10. living wall paper + get b8Tri level, get temperature on the wallpaper of the phone
11. send notifications while app is closed + click notification to open app
12. alarm clock while app is closed + pause replay alarm
13. how to connect a game app to google play
14. how to delete file on the phone from the app.
15. save to external SDcard
16. change the apps background image programmatically without changing activity

where did I search for those walkthroughs ? all over the web and tried the tutorials of :
Jason Smith, Eric Maupin, Stephane Delcroix, Seth Rosetter, Rui Marinho, Chris King, E.Z. Hart, Samantha Houts, Paul DiPietro, and interim product manager Bryan Hunter

and the tutorials of tiffany ford and james montemango.

bottom line is their tutorials for some reasone don't work and I therefore, at this moment, deem xamarin a failure !
yes it may work on their blogs and video channels but they have the real access to the "how to" and we don't
and it doesn't work.