Mixed mode assembly is built against version ‘v1.1.4322’

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The way I fixed this error was by changing the ‘configuration’ node on my app.config from this:

<startup>
   <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>

to this:

<startup useLegacyV2RuntimeActivationPolicy="true">
   <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>

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