How do I convert C++ struct to a C# struct

typedef unsigned char uint8;
typedef int sint32;
typedef struct BY_BITMAP
{
    sint32 biWidth;      
    sint32 biHeight;     
    sint32 biBitCount;   
    sint32 bfSize;       
    sint32 BytesPerLine; 
    uint8 **ScanLine;    
    uint8 *buffer;       
}BY_BITMAP;

public void SavePic()
{
 ByBitmap[] sources = new ByBitmap[2];
            sources[0] = new ByBitmap();
            sources[0].buffer = null;
            sources[0].ScanLine = null;
            sources[1] = new ByBitmap();
            sources[1].buffer = null;
            sources[1].ScanLine = null;
ScannerIDnative.SavePicToStream(ref sources,IDcardMode)
}

public struct ByBitmap
   {

       public int biWidth;
       public int biHeight;
       public int biBitCount;
       public int bfSize;
       public int BytesPerLine;
       public byte[] ScanLine;
       public byte[] buffer;
   }