Create ZIP file with multiple file in a folder

   first you can add system.io.compression.filedirectory
 then create a file and move it a folder then compress it


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

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string fileNamewithExtension = DateTime.Now.Ticks.ToString() + ".txt";
            string filePath = @"C:\AbhishekData\" ;
            string fileName = filePath + fileNamewithExtension;
            using (FileStream fs = new FileStream(fileName, FileMode.Append, FileAccess.Write))
            {
                string s = "My Name is abhishek";
                byte[] byteArray = Encoding.ASCII.GetBytes(s);
                fs.Write(byteArray, 0, byteArray.Length);
                fs.Flush();
                fs.Close();
              
                string zipPath = @"C:\AbhishekData\"+ DateTime.Now.Ticks.ToString()+".zip";
                if (!Directory.Exists(@"C:\AbhishekData\myabc"))
                {
                    Directory.CreateDirectory(@"C:\AbhishekData\myabc");
                    File.Move(fileName, @"C:\AbhishekData\myabc\"+ fileNamewithExtension);
                    ZipFile.CreateFromDirectory(@"C:\AbhishekData\myabc", zipPath,CompressionLevel.Fastest,true);
                }
                else
                {
                    File.Move(fileName, @"C:\AbhishekData\myabc\"+ fileNamewithExtension);
                    ZipFile.CreateFromDirectory(@"C:\AbhishekData\myabc", zipPath, CompressionLevel.Fastest, true);
                }
            }
        }
    }
}