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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T21:49:35+00:00 2026-05-13T21:49:35+00:00

In my C# code, I need to call a function from a C++ Dll

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In my C# code, I need to call a function from a C++ Dll that I wrote.The function is generic.
So , should I just import it like this:

[DllImport("myDll.dll")]
private static extern TypeName functionName<TypeName>( int arg1, int arg2 );

Is this correct syntax?
Thanks.

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  1. Editorial Team
    Editorial Team
    2026-05-13T21:49:36+00:00Added an answer on May 13, 2026 at 9:49 pm

    This cannot work, there is no main-stream C++ compiler that makes templates exportable. Furthermore, templates are instantiated by the C++ compiler through type erasure, similar to the way Java generics works. In other words, the concrete callable functions have to be embedded in the DLL by the C++ compiler. They are no longer generic.

    As an alternative, you can write a ref class in the C++/CLI language. That produces a true .NET generic class, usable by any .NET language that supports generics.

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