c-like read\write data structure in Nim?

[xupypr]

    struct blabla {
      int a;
      char b;
    }
    
    ....
    struct blabla blablavar;
    
    blablavar.a = 1;
    blablavar.b = 'a';
    
    fopen...
    fwrite(fd,&blablavar,sizeof(blablavar));
    
    
    Run

........... like this?