How to convert a C++ struct with fixed byte size to C# struct

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C++/CLI

C#

Win32

MFC

C#4.0

Hi i have this struct in C++,how to get an equivalent struct in C#

typedef struct
{
BYTE a :4 ;
BYTE b :4 ;
BYTE c :4;
BYTE d :4 ;
BYTE e :4;
BYTE f :1;
BYTE g :1;
BYTE h :1;
BYTE i:1;
BYTE j :4 ;
BYTE k :4 ;
}demostruct;