c++ cli - How do I convert a System::String^ to const char*?

Question

I'm developing an app in C++/CLI and have a csv file writing library in unmanaged code that I want to use from the managed portion. So my function looks something like this:

bool CSVWriter::Write(const char* stringToWrite);

...but I'm really struggling to convert my shiny System::String^ into something compatible. Basically I was hoping to call by doing something like:

if( m_myWriter->Write(String::Format("{0}",someValueIWantToSave)) )
{
    // report success
}

Answer 1

using namespace System::Runtime::InteropServices;
const char* str = (const char*) (Marshal::StringToHGlobalAnsi(managedString)).ToPointer();

From Dev Shed.