Hey everyone, we're working on migrating an existing Windows desktop application to a web application.

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We are trying to use WebAPI as our entry point but having a bit of trouble.

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Existing backend data access and business logic DLL's are being referenced by the new web api project (not project references). Using StructureMap to inject services from those DLL's.

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Existing backend dependency injection is handled using Spring.Net.

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We have a simple controller that is calling one of the simple services to retrieve some data.

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When testing the API we're getting a json response but it is simply a null reference exception thrown against a property of one of the services injected.

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So the injection of the service from the DLL into our web api is working ok, but that service's properties (handled by Spring.Net) are not being resolved.

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Have tried google but it's kind of hard to summarize this problem into a search query. Anyone able to point me toward a resource that could help with this issue?

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Any help appreciated!