How Can I Declare Two Diamensional Arrray In C# Structure?

This is a c code. I want to create equivalent code in c#
              Struct
             {

                unsigned char abc[2][8];
		unsigned char efg[2][8];
             }
	How can I declare this in c#?    
       [StructLayout(LayoutKind.Explicit)]
      //[StructLayout(LayoutKind.Sequential)]
     
      public struct test
        {
            [FieldOffset(0)]
            [MarshalAs(UnmanagedType.ByValArray, SizeConst =8)]
            public byte[,] abc;
        }
Can anyone tell Is this declaration is right or not??

Thanks..