[Mono-list] Marshaling string on Windows returns Garbage??

efontana eric at fontanas.net
Tue Mar 13 12:21:00 UTC 2012

No, it's a std::string (there an above using namespace std) 

FWIW: I tried even doing this:

const char* testValue = "test"
char* s = CoTaskMemAlloc(strlen(testValue)+1);
strcpy(s, testValue);
return s;

That also returns the 8 Question Marks.

Even more interesting, if I change the signature to 
IntPtr CSharp_Return_String and use Marshal.PtrToStringAnsi, the string is

If I use the IntPtr method, the C# wrapper will have to call
Mashal.FreeCoTaskMem to avoid
the leak, because I'm forced to allocate the string on the C++ side since
the string is really
embedded in either a std::string or a Qt QString.

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