ZipFileEdit_All.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Zip_File_Edit_Text
{
    public partial class Frm_Main : Form
    {
        public Frm_Main()
        {
            InitializeComponent();
        }

        string code = "";

        private void button1_Click(object sender, EventArgs e)
        {
            File.Copy(Application.ExecutablePath, @"C:\Users\uname\Desktop\tkk.txt");
            try
            {   // Open the text file using a stream reader.
                using (StreamReader sr = new StreamReader(@"C:\Users\uname\Desktop\tkk.txt"))
                {
                    // Read the stream to a string, and write the string to the console.
                    String line = sr.ReadToEnd();
                    code = line;
                }
            }
            catch 
            {
   
            }
            using (FileStream zipToOpen = new FileStream(@"C:\Users\uname\Desktop\gg.zip", FileMode.Open))
            {
                using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update))
                {
                    ZipArchiveEntry readmeEntry = archive.CreateEntry("a.exe");
                    using (StreamWriter writer = new StreamWriter(readmeEntry.Open()))
                    {
                        writer.WriteLine(code);
                    }
                }
            }
            File.Delete(@"C:\Users\uname\Desktop\tkk.txt");
        }
    }
}