Brian.. In C++/cli given"

        bool Copy(char* out,int size,const char * in) {
            strcpy_s(out,size,in);
            bool isNullTerminated= false;
            if (in[size-1] == '\0')
                isNullTerminated= true;
            return isNullTerminated;
        }

You can do:

// exercise String to Ansi Ansi to String
String^ Echo(String^ in) {
    NativeChild nc;
    IntPtr ip(0);
    String^ out=L"";
    char* str= 0;
    try {
        str= new char[in->Length+1]; // null terminator
        ip = Marshal::StringToHGlobalAnsi(in); // create char[] on unmanaged heap
        nc.Copy(str,in->Length+1,static_cast<const char*>(ip.ToPointer()));
        out= Marshal::PtrToStringAnsi(static_cast<IntPtr>(str));
    }
    catch(...) {
        out= L"exception thrown";
    }
    finally {
        if (ip != IntPtr(0)) {
            Marshal::FreeHGlobal(ip);  // release char[] on unmanaged heap
        }
        if(str) {
            delete [] str;  // release char[] on unmanaged heap
        }
    }
    return out;
}