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

<?xml version="1.0" encoding="utf-8"?>
<configuration>
	<!--
   The .NET 2.0 build of the console runner only 
   runs under .NET 2.0 or higher. The setting
   useLegacyV2RuntimeActivationPolicy 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>