Reusing structs from C in C#

Question

Is it possible to import in C# structs definitions from C dlls?

In all the examples I saw were to redefine the structs in C#. What if the struct changes? I need to alter in two locations in my project...

struct MyCStruct { unsigned long A; unsigned long B; unsigned long C; };

and in C#:

 [StructLayout(LayoutKind.Sequential)] internal struct MyCStructAgain { public uint A; public uint B; public uint C; }

If It's not possible to reuse the definitions, why is that?

Thanks

"If It's not possible to reuse the definitions, why is that?" - because it's a different language? :-) — CodeCaster
– CodeCaster, Commented Jul 30, 2012 at 8:46
Yeah, but .NET makes all languages work together seamlessly... — Daniel Earwicker
– Daniel Earwicker, Commented Jul 30, 2012 at 8:48
Short answer, no. The only thing that can be seen in an unmanaged .dll are the exported function definitions. — Robert Rouhani
– Robert Rouhani, Commented Jul 30, 2012 at 8:52
.Net makes all languages work together seamlessly only if language is .net compliant. Whereas C is not. — ZafarYousafi
– ZafarYousafi, Commented Jul 30, 2012 at 8:57

Alois Kraus · Accepted Answer · 2012-07-30 09:51:40Z

You could compile your structs as C++/CLI where the compiler generates the managed counterparts for you and you can reference them then. You would need an ifdef to prepend value to make it a .NET struct.

#ifdef CLIEXPORT #define value #endif CLIEXPORT struct MyCStruct { unsigned long A; unsigned long B; unsigned long C; };

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