Save data in executable

Question

I have a portable executable that saves data to a file in the same folder as the executable. Is there any way that I can save data into the executable itself when I close the ap

Answer 1

you can add data to end of executable file :

var executableName = Process.GetCurrentProcess().MainModule.FileName;

    // rename executable file
    var newExecutableName = fullPath.Replace(".exe", "_.exe");
    FileInfo fi = new FileInfo(executableName);
    fi.MoveTo(newExecutableName);

    // make copy of executable file to original name
    File.Copy(newExecutableName, executableName);

    // write data end of new file
    var bytes = Encoding.ASCII.GetBytes("new data...");

    using (FileStream file = File.OpenWrite(executableName))
      {
          file.Seek(0, SeekOrigin.End);
          file.Write(bytes, 0, bytes.Length);
       }

    // we can delete old file when exited