.NET for Android error XA0126
This issue happens when you are trying to use fast deployment on a device which
does not support it. Fast deployment requires features which are not available
on devices running API 20 or lower. The Fast Deployment system makes use of the
run-as
feature of the Android OS. This feature was either not available or had
limited capabilities in API 20 and earlier.
Disable Fast Deployment by setting EmbedAssembliesIntoApk = True
in your .csproj.
Or turn off Fast Deployment
in the IDE. You will still be able to debug on the device,
all the required files will be packaged inside the .apk.