Two interops of same name in one project












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I have two versions of a third-party com library. They are identical in namespace, but one is built to work with devices of X model, while the other works with Y model hardware. If I use the wrong library I get all kinds of runtime errors so they are not interchangable despite bearing the same classnames and almost the same interface. This is a questionable solution on the library vendors' behalf but in my case I either take it or leave.



I would like to work with both libraries in one project, allowing the user to specify which model is connected. It should be assumed that the end-user can never have both versions on their machine.



I've managed to add interops for both libraries to the project in Visual Studio by renaming them but I also need to somehow differentiate which one is used, so I've assigned aliases to them. The first interop I've assigned an alias to doesn't cause any problems, but the second one aliased always creates compiler errors.




The extern alias 'xxx' was not specified in a /reference option
No matter what I do it refuses to recognize the second alias. Furthermore, if I press the view object in browser button on the second interop it points to the information of the first one which suggests to me that Visual Studio in it's infinite wisdom ignores the second interop completely.




In past a coleague solved this by disassembling one of the interops and modifying the namespace but I'd like to know if there are any better solutions.
Thank you for your time.










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    I have two versions of a third-party com library. They are identical in namespace, but one is built to work with devices of X model, while the other works with Y model hardware. If I use the wrong library I get all kinds of runtime errors so they are not interchangable despite bearing the same classnames and almost the same interface. This is a questionable solution on the library vendors' behalf but in my case I either take it or leave.



    I would like to work with both libraries in one project, allowing the user to specify which model is connected. It should be assumed that the end-user can never have both versions on their machine.



    I've managed to add interops for both libraries to the project in Visual Studio by renaming them but I also need to somehow differentiate which one is used, so I've assigned aliases to them. The first interop I've assigned an alias to doesn't cause any problems, but the second one aliased always creates compiler errors.




    The extern alias 'xxx' was not specified in a /reference option
    No matter what I do it refuses to recognize the second alias. Furthermore, if I press the view object in browser button on the second interop it points to the information of the first one which suggests to me that Visual Studio in it's infinite wisdom ignores the second interop completely.




    In past a coleague solved this by disassembling one of the interops and modifying the namespace but I'd like to know if there are any better solutions.
    Thank you for your time.










    share|improve this question







    New contributor




    CodeMolester69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      I have two versions of a third-party com library. They are identical in namespace, but one is built to work with devices of X model, while the other works with Y model hardware. If I use the wrong library I get all kinds of runtime errors so they are not interchangable despite bearing the same classnames and almost the same interface. This is a questionable solution on the library vendors' behalf but in my case I either take it or leave.



      I would like to work with both libraries in one project, allowing the user to specify which model is connected. It should be assumed that the end-user can never have both versions on their machine.



      I've managed to add interops for both libraries to the project in Visual Studio by renaming them but I also need to somehow differentiate which one is used, so I've assigned aliases to them. The first interop I've assigned an alias to doesn't cause any problems, but the second one aliased always creates compiler errors.




      The extern alias 'xxx' was not specified in a /reference option
      No matter what I do it refuses to recognize the second alias. Furthermore, if I press the view object in browser button on the second interop it points to the information of the first one which suggests to me that Visual Studio in it's infinite wisdom ignores the second interop completely.




      In past a coleague solved this by disassembling one of the interops and modifying the namespace but I'd like to know if there are any better solutions.
      Thank you for your time.










      share|improve this question







      New contributor




      CodeMolester69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I have two versions of a third-party com library. They are identical in namespace, but one is built to work with devices of X model, while the other works with Y model hardware. If I use the wrong library I get all kinds of runtime errors so they are not interchangable despite bearing the same classnames and almost the same interface. This is a questionable solution on the library vendors' behalf but in my case I either take it or leave.



      I would like to work with both libraries in one project, allowing the user to specify which model is connected. It should be assumed that the end-user can never have both versions on their machine.



      I've managed to add interops for both libraries to the project in Visual Studio by renaming them but I also need to somehow differentiate which one is used, so I've assigned aliases to them. The first interop I've assigned an alias to doesn't cause any problems, but the second one aliased always creates compiler errors.




      The extern alias 'xxx' was not specified in a /reference option
      No matter what I do it refuses to recognize the second alias. Furthermore, if I press the view object in browser button on the second interop it points to the information of the first one which suggests to me that Visual Studio in it's infinite wisdom ignores the second interop completely.




      In past a coleague solved this by disassembling one of the interops and modifying the namespace but I'd like to know if there are any better solutions.
      Thank you for your time.







      visual-studio .net-4.0 com-interop






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