Writing to a zip file C# with Example
To write a new .zip file: System.IO.Compression System.IO.Compression.FileSystem using (FileStream zipToOpen = new FileStream(@"C:\temp", FileMode.Open)) { using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update)) { ZipArchiveEntry readmeEntry = archive.CreateEntry("Readme.txt"); using (StreamWriter writer = new StreamWriter(readmeEntry.Open())) { writer.WriteLine("Information about this package."); writer.WriteLine("========================"); } } }