C++对本地C++ DLL的访问

我正在尝试创建一个访问本地C++ DLL的程序。下面是示例代码。

C++代码

GetRmaPin (const char *rma_password, const char *serial, unsigned char *rma_pin);

C代码

class Program
{
    static void Main ( string [ ] args )
    {
        string[] password = { "74f3d3a287cee548c1842c07090d6a274dd0ddbd04bfd1e4694861a369bc7304" };
        string[] serial = { "184393900006" };
        //StringBuilder rma_pin = new StringBuilder(2048);
        byte[] rma_pin = new byte[2048];

        int rc = GetRmaPin(password, serial, ref rma_pin);
        Console.WriteLine ( "Result: " + rc.ToString ( ) );
        Console.WriteLine ( "Payload: " + rma_pin.ToString ( ) );
        Console.Read ( );
    }

    [DllImport ( "Security.dll" , EntryPoint = "GetRmaPin" , CallingConvention = CallingConvention.Cdecl)]
    public static extern int GetRmaPin (
        [In][MarshalAs ( UnmanagedType.LPArray , ArraySubType = UnmanagedType.LPStr )] string [ ] password ,
        [In][MarshalAs ( UnmanagedType.LPArray , ArraySubType = UnmanagedType.LPStr )] string [ ] serial ,
        ref byte[] rmap_in );
}

错误消息: 托管调试助手“fatalExecutionEngineerRor” message=managed debugging assistant'fatalExecutionEngineerRor':'运行时遇到致命错误。错误的地址是0x732DC93D,在线程0x97A4上。错误代码为0xC0000005。此错误可能是CLR或用户代码的不安全或不可验证部分中的错误。此错误的常见来源包括用户对COM互操作或PInvoke的封送处理错误,这可能会损坏堆栈。