Calling method of another dll of interface

Question

In my code  extern alias OnlineQBO is my alias of DevDefined.OAuth.dll i have second dll is XeroApi.dll whenever my following line of code is executes  conReq object creating by the DevDefined.OAuth.dll  but object call the Get() method of XeroApi.dll  so error ocuring as An explicit conversion exists(are you missing a cast?) OnlineQBO::DevDefined.OAuth.Consumer.IConsumerRequest conReq = oSession.Request(); conReq = conReq.Get(); Can you suggest any anwser please?

Vulpes · Answer

Well you've defined conReq to be a variable of type: DevDefined.OAuth.Consumer.IConsumerRequest in DevDefined.OAuth.dll. Consequently in this line: conReq = conReq.Get(); you must be calling the Get() method of the same interface and assigning the result back to conReq. There's no way that you could be calling a Get() method in your other dll even if it contains an interface of the same name. So the question is what is the return type of the Get() method and if it's not the same as IConsumerRequest how does it relate to it?