Passing 2D byte array from C# to CLR dll

Hello,

My CLR class has to get array of C# strings and convert them to 1D array of char pointers passed to a Win32 DLL.

In C# I ran:

private byte[][] convertToBytes(String[] strings)
        {
                byte[][] data = new byte[strings.Length][];
                for (int i = 0; i < strings.Length; i++)
                {
                    String s = strings[i];
                    data[i] = Encoding.ASCII.GetBytes(s);
                }
                return data;
        }

String[] strings = new String[]{"first", "second"};

byte[][] byteStrings = convertToBytes(strings);

MySafeClass.OpenFile(byteStrings);

What should be the prototype in the CLR code ?

I tried:

int OpenFile (array <System::Byte^>^ byteArray)
{
// Do something
}

But according to the C# compiler: