using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.IO;
 
namespace PatchedApp
{
    class Program
    {
        public static void LoadInvoke(string path)
        {
            AppDomain sandbox = AppDomain.CreateDomain("Sandbox");
            try
            {
                AssemblyName an = AssemblyName.GetAssemblyName(path);
                Assembly a = sandbox.Load(an);
                Type[] mytypes = a.GetTypes();
                BindingFlags flags = (BindingFlags.NonPublic | BindingFlags.Public |
                    BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly);
 
                Console.WriteLine(an.Version.ToString());
 
                foreach (Type t in mytypes)
                {
                    MethodInfo[] mi = t.GetMethods(flags);
                    Object obj = Activator.CreateInstance(t);
 
                    foreach (MethodInfo m in mi)
                    {
                        m.Invoke(obj, null);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            finally
            {
                AppDomain.Unload(sandbox);
            }
        }
 
        public static void Main(string[] args)
        {
            string file = Directory.GetCurrentDirectory() + "\\PatchedLib.dll";
            string patch = Directory.GetCurrentDirectory() + "\\PatchedLib1.dll";
            string temp = "C:\\_PatchedLib.dll";
 
            LoadInvoke(file);
 
            File.Move(file, temp);
            File.Copy(patch, file);
            LoadInvoke(file);
 
            File.Delete(file);
            File.Move(temp, file);
 
            Console.ReadKey();
        }
    }
}