c# - pinvoke c function - System.BadImageFormatException -


im trying call c function c# im getting badimageformatexception.

here c function header:

extern "c" {     __declspec(dllexport) bool validate(char key[]); }

here how im calling c#

[dllimport("mydll.dll")] static extern bool validate(char[] key);

whats wrong here.

when calling native methods, should compile c# code 64 or 32 bit explicitely. 

 project/properties/build/platform target

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