using System.IO;
using System.IO.Compression;

void createArchive()
{
    // create new zipArchive in memory. leave it open.

    MemoryStream ms = new MemoryStream();
    ZipArchive archive = new ZipArchive(ms, ZipArchiveMode.Create, true);

    // add results to archive         

            while (myDR.Read())
            {
                result_name = (String)myDR[0];
                result_size = (long)myDR[1];
                result_binary_data = (Byte[])myDR[2];
                AddResultToArchive(ref archive, result_name + ".out", ref result_binary_data);
             }

  // create archive completed, insert archive into dbo.Download
            
            Byte[] archive_as_binary_data = ms.ToArray();
            ms.Dispose();

           String cmd= "INSERT into dbo.Download archive_name, binary_data...";
           sqlCommand.Execute(cmd);
}

 // create archive entry, write result binary data to entry

        void AddResultToArchive(ref ZipArchive zipArchive, String result_name, ref byte[] result_binary_data)
        {
            ZipArchiveEntry resultEntry = zipArchive.CreateEntry(result_name);
            using (BinaryWriter binWriter = new BinaryWriter(resultEntry.Open()))
            {
                binWriter.Write(result_binary_data, 0, result_binary_data.Length);
            }
        }

var a = 2;
var b = 3;
var c = a/b;