Marshal.SizeOf

[XingZheng]

Hi
struct ABC
{
UInt32 a; //4 bytes
byte b; //1 byte
}//=5bytes

Why does Marshal.SizeOf(typeof(ABC)) return 8 ?
Thanks

 

[Mattias Sjögren]

Why does Marshal.SizeOf(typeof(ABC)) return 8 ?

Because of the default packing and alignment for structs. If you want
a 5 byte struct, you can add the attribute

[StructLayout(LayoutKind.Sequential, Size=5)]

or

[StructLayout(LayoutKind.Sequential, Pack=1)]



Mattias