Struct marshal in C#

Question

I have the following struct in C#

unsafe public struct control
    {
        public int bSetComPort;
        public int iComPortIndex;
        public int iBaudRa         


        

Answer 1

SizeOf doesn't work on arrays. Use array.Length * Marshal.SizeOf(elementType) instead.

Answer 2

The error you are reporting as a compile error is in fact a runtime error (an ArgumentException). When you want to use structtobyte to convert a control to byte[] you should pass the method a reference to control, not a byte array (byte[]).

control ctrl = new control();
byte[] bytes = structtobyte(ctrl);