c# - Reading binary file into struct -

i know has been answered after reading other questions i'm still no solution. have file written following c++ struct:

typedef struct mystruct{     char name[127];     char s1[2];     char mailbox[149];     char s2[2];     char routeid[10]; } my_struct; 

my approach able parse 1 field @ time in struct, issue cannot s1 , mailbox parse correctly. in file, s1 field contains "\r\n" (binary 0d0a), , causes parsing code not parse mailbox field correctly. here's parsing code:

[structlayout(layoutkind.explicit, size = 0x80 + 0x2 + 0x96)] unsafe struct my_struct {     [fieldoffset(0)]     [marshalas(unmanagedtype.byvaltstr, sizeconst = 0x80)]     public string name;      [fieldoffset(0x80)]     public fixed char s1[2];      /* not work, "could not load type 'my_struct' ... because contains object field @ offset 130 incorrectly aligned or overlapped non-object field." */     [fieldoffset(0x80 + 0x2)]     [marshalas(unmanagedtype.byvaltstr, sizeconst = 0x96)]     public string mailbox; } 

if comment out last field , reduce struct's size 0x80+0x2 work correctly first 2 variables.

one thing note name , mailbox strings contain null terminating character, since s1 doesn't have null-terminating character seems messing parser, don't know why because me looks code explicitly telling marshaler s1 field in struct fixed 2-char buffer, not null-terminated string.

here pic of test data (in code seek past first row in binaryreader, "name" begins @ 0x0, not 0x10).

here's 1 way, doesn't use unsafe (nor particularly elegant/efficient)

using system.text; using system.io;  namespace readcppstruct { /*  typedef struct mystruct{     char name[127];     char s1[2];     char mailbox[149];     char s2[2];     char routeid[10];     } my_struct;  */ class mystruct {     public string name { get; set; }     public string mailbox { get; set; }     public string routeid { get; set; } }  class program {     static string getstring(encoding encoding, byte[] bytes, int index, int count)     {         string retval = encoding.getstring(bytes, index, count);         int nullindex = retval.indexof('\0');         if (nullindex != -1)             retval = retval.substring(0, nullindex);         return retval;     }      static mystruct readstruct(string path)     {         byte[] bytes = file.readallbytes(path);          var utf8 = new utf8encoding();          var retval = new mystruct();         int index = 0; int cb = 127;         retval.name = getstring(utf8, bytes, index, cb);         index += cb + 2;         cb = 149;         retval.mailbox = getstring(utf8, bytes, index, cb);         index += cb + 2;         cb = 10;         retval.routeid = getstring(utf8, bytes, index, cb);          return retval;     }       // http://stackoverflow.com/questions/30742019/reading-binary-file-into-struct     static void main(string[] args)     {         mystruct ms = readstruct("my_struct.data");     } } }