Question about C # [structlayout (layoutkind. Sequential )]

Struct is composed of several members. There are two types of layout:

1. Sequential: sequential layout, such

Struct S1 {

Int;

Int B ;}

By default, A is first arranged in the memory, and then B is arranged. That is, if the address of a and the address of B can be obtained,

The difference is the length of an int type, 4 bytes

[Structlayout (layoutkind. Sequential)]

Struct S1 {

Int;

Int B ;}

This is the same as the previous one, because the default memory arrangement is sequential, that is, sequential arrangement by members.

2. explicit, exact layout requires fieldoffset ()

Set the location of each Member to implement the C-like public body function.

[Structlayout (layoutkind. explicit)]

Struct S1 {

[Fieldoffset (0)]

Int;

[Fieldoffset (0)]

Int B ;}

In this way, A and B are in the same memory address.