1MemoryStream ms = new MemoryStream();

 2Response.ContentType = "application/octet-stream";

 3string strFileName = HttpUtility.UrlEncode("TestFileName");

 4Response.AddHeader("Content-Disposition", "attachment; filename=" + strFileName + ".zip"); 

 5

 6zlib.ZOutputStream outputStream = new zlib.ZOutputStream(ms, zlib.zlibConst.Z_DEFAULT_COMPRESSION); 

 7

 8string strInfo = "string"; 

 9

10byte[] buffer = new byte[strInfo.Length];

11buffer = System.Text.Encoding.UTF8.GetBytes(strInfo); 

12

13outputStream.Write(buffer, 0, buffer.Length); 

14

15outputStream.finish();

16outputStream.Close(); 

17

18Response.Clear();

19Response.BinaryWrite(ms.ToArray());

20Response.End();

21