One of the biggest benefits that you have with ASP.NET Web API is that it gives 100% transparency of the source code because it is open source. You can easily enlist in the code repository and add the symbol path based on instructions at the CodePlex site,
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In the previous blog post, you can see how easy it is to enable OData query syntax for a particular action using Web API OData. Simply add a Queryable attribute to your action as follows, and you are done.