Xamarin / Mono: Android adb tracing / debug logging

adb shell setprop debug.checkjni 1
adb shell setprop debug.mono.env MONO_LOG_LEVEL=info
adb shell setprop debug.mono.log gref,gc

And if none of the above helps:

adb shell setprop debug.mono.trace N:Your.App.Namespace

Undoing

adb shell setprop debug.checkjni 0
adb shell setprop debug.mono.env ''
adb shell setprop debug.mono.log ''
adb shell setprop debug.mono.trace ''