[Mono-list] how to marshal C style array in a struct

[Lloyd Dupont]

i have a C struct like

struct MyStruct
{
	int len;
	char * data;
};

i want to declare it in C# as something like (for interop)

[StructLayout(LayoutKind.Sequential)]
struct MyStruct
{
	public int len;
	[MarshalAs(UnmanagedType.LPArray)] public byte[] data;
}

hum.. but what could be cool is to have something like SizeParamIndex 
attribute to give data.Length (instead of 1....), any idea, advice, 
pointer ?

BTW SizeParamIndex work, but only in function, here it is a Struct...