.NET for Android error XA1031
Example messages
The 'AndroidHttpClientHandlerType' property value 'Foo.Bar.HttpHander, MyApp' must derive from 'System.Net.Http.HttpMessageHandler'.
Please change the value to an assembly-qualifed type name which inherits from '{1}' or remove the property completely.
The 'AndroidHttpClientHandlerType' property value '.NET for Android.Net.AndroidClientHandler' must not derive from 'System.Net.Htt.HttpClientHandler'.
Please change the value to an assembly-qualifed type name which inherits from 'System.Net.Http.HttpMessageHandler' or remove the property completely.
Solution
Edit your csproj directly and change the 'AndroidHttpClientHandlerType' to a valid value.
Valid values can be found at ~/android/deploy-test/building-apps/build-properties.md#AndroidHttpClientHandlerType.
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