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Xamarin.Android warning XA0107

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Issue

The Xamarin.Android build will emit a XA0107 warning if it is using a "Reference Assembly" during the build, where it shouldn't be. These are sanity checks that likely mean there is a bug in Xamarin.Android.

XA0107 means that a file such as System.dll located within the Xamarin.Android installation is being passed as input to one of the following MSBuild tasks:

  • <BuildApk />
  • <ResolveAssemblies />

Solution

Consider submitting a bug if you are getting this warning under normal circumstances.