apphost-extract/src/apphost-extract/apphost-extract/AppHostFile.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace apphost_extract
{
    public class AppHostFile
    {
        private FileStream FileStream;

        public AppHostFileHeader Header { get; set; }


        public AppHostFile(FileStream fileStream) 
        {
            FileStream = fileStream;
            Header = new AppHostFileHeader(FileStream);
        }


        public static AppHostFile Open(string path)
        {
            if (!File.Exists(path)) Log.Fatal("File not found.");

            try
            {
                FileStream fs = new FileStream(path, FileMode.Open, FileAccess.ReadWrite);
                AppHostFile file = new AppHostFile(fs);
                return file;
            }
            catch(Exception ex)
            {
                Log.Fatal($"Exception when trying to open file: {ex.Message}");
                return null;
            }
        }
    }
}