Any way of suppressing forms\xamarin output to the Application Output log?

My application output log is full of junk so trying to find MY log file entries and compare runs is very difficult.
There are 1000s of lines like:

...
[PhoneWindow] DecorView setVisiblity: visibility = 0 ,Parent =ViewRoot{41f45370 uk.co.myco.app1/md5fb8891a359901dd793a1aa64b7c4e666.MainActivity,ident = 0}, this =com.android.internal.policy.impl.PhoneWindow$DecorView{41e89328 V.E..... R.....ID 0,0-1080,1920}
[GraphicBuffer] create handle(0x70728378) (w:1088, h:1920, f:1)
[MaliEGL] [Mali]window_type=1, is_framebuffer=0, errnum = 0
[MaliEGL] [Mali]surface->num_buffers=4, surface->num_frames=3, win_min_undequeued=1
[MaliEGL] [Mali]max_allowed_dequeued_buffers=3
[GraphicBuffer] close handle(0x70728378) (w:1088 h:1920 f:1)
[GraphicBuffer] create handle(0x70728378) (w:1088, h:1920, f:1)
[OpenGLRenderer] setViewport 1080x1920 <0x6adb5490>
[OpenGLRenderer] prepareDirty (0.00, 0.00, 1080.00, 1920.00) opaque 1 <0x6adb5490>
[OpenGLRenderer] finish <0x6adb5490>
...

Any way of suppressing this?

Thanks
Steve