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I just switched to vs2010 from vs2008. Exact same solution, except now every single call to a C++ dll yields a 'pinvokestackimbalance' exception. This exception does not get fired in 2008. I have complete access to the C++ dll and to the calling application. There does not appear to be any problem with the pinvoke, but this problem is making debugging other problems impossible; the IDE is stopping constantly to tell me about these things. For instance, here's the C# signature: [DllImport("ImageOperations.dll")] static extern void FasterFunction( [MarshalAs(UnmanagedType.LPArray)]ushort[] inImage, //IntPtr inImage, [MarshalAs(UnmanagedType.LPArray)]byte[] outImage, //IntPtr outImage, int inTotalSize, int inWindow, int inLevel); Here's what it looks like on the C++ side: #ifdef OPERATIONS_EXPORTS #define OPERATIONS_API __declspec(dllexport) #else #define OPERATIONS_API __declspec(dllimport) #endif extern "C" { OPERATIONS_API void __cdecl FasterFunction(unsigned short* inArray, unsigned char* outRemappedImage, int inTotalSize, int inWindow, int inLevel); } What's different between vs2010 and vs2008 that would cause these exceptions to get thrown? Should I be adding a different set of parameters to the DllImport directive?

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