CanGetInstance throws System.ArgumentNullException when called with an unregistered serviceType and null serviceName

[mesakomarevich]

As stated in the title, calling CanGetInstance(serviceType, serviceName) where serviceType has not yet been registered and serviceName = null will result in a System.ArgumentNullException.

This problem occurs with LightInject version 6.4.0-6.6.1

Stack trace is as follows:

System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.ThrowHelper.ThrowArgumentNullException(String name)
   at System.Collections.Concurrent.ConcurrentDictionary`2.TryGetValue(TKey key, TValue& value)
   at LightInject.ServiceContainer.GetRegisteredEmitMethod(Type serviceType, String serviceName)
   at LightInject.ServiceContainer.GetEmitMethod(Type serviceType, String serviceName)
   at LightInject.ServiceContainer.CanGetInstance(Type serviceType, String serviceName)

I will be creating a PR with a fix ASAP.

[mesakomarevich]

Closing this issue as a resolution was merged long ago.