如何将OData键值添加到Entity Framework类？

I am using MVC 5, Microsoft OData 2.1, and Entity Framework 6. I am trying to consume an OData feed that I wrote using the EntitySetController class. when I add the service reference and it consumes the OData metadata, it can see my resource, but when I try to save it I get an error:I am using MVC 5, Microsoft OData 2.1, and Enti