C++/CLI Converting from System::String^ to std::string

Don't roll your own, use these handy (and extensible) wrappers provided by Microsoft.

For example:

#include <msclr\marshal_cppstd.h>

System::String^ managed = "test";
std::string unmanaged = msclr::interop::marshal_as<std::string>(managed);

You can easily do this as follows

#include <msclr/marshal_cppstd.h>

System::String^ xyz="Hi boys"; 

std::string converted_xyz=msclr::interop::marshal_as< std::string >( xyz);

Check out System::Runtime::InteropServices::Marshal::StringToCoTaskMemUni() and its friends.

Sorry can't post code now; I don't have VS on this machine to check it compiles before posting.

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