Xamarin.Forms-Samples/Calculator/tools/NUnit/nunit.exe.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
	<!--
   The GUI only runs under .NET 2.0 or higher. The
   useLegacyV2RuntimeActivationPolicy setting only
   applies under .NET 4.0 and permits use of mixed 
   mode assemblies, which would otherwise not load 
   correctly.
  -->
	<startup useLegacyV2RuntimeActivationPolicy="true">
		<!-- Comment out the next line to force use of .NET 4.0 -->
	</startup>
	<runtime>
		<!-- Ensure that test exceptions don't crash NUnit -->
		<legacyUnhandledExceptionPolicy enabled="1"/>
		<!-- Run partial trust V2 assemblies in full trust under .NET 4.0 -->
		<loadFromRemoteSources enabled="true"/>
		<!-- Look for addins in the addins directory for now -->
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<probing privatePath="lib;addins"/>
		</assemblyBinding>
	</runtime>
</configuration>