How to marshal an array of structs - (.Net/C# => C++)

Question

Disclaimer: Near zero with marshalling concepts..

I have a struct B that contains a string + an array of structs C. I need to send this across the giant interop chas

Answer 1

The answer depends on what the native definitions are that you are trying to marshal too. You haven't provided enough information for anyone to be able to really help.

A common thing that trips people up when marshalling strings in native arrays is that native arrays often use a fixed-size buffer for the string that is allocated inline with the struct. Your definition is marshalling the strings as a pointer to another block of memory containing the string (which is the default).

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = ##)] might be what you are looking for...