create zip file from csv in asp.net

Anyone can tell , how will i create a zip file of below csv generated code..what is the code for that?
Thanks in advance

my .csv generated code is.....


if (RadioButtonList1.SelectedItem.Text == "CSV")

{
Response.Clear();

Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=DataTable.csv");
Response.Charset = "";
Response.ContentType = "application/text";
StringBuilder sb = new StringBuilder();
for (int k = 0; k < dtTemp.Columns.Count; k++)
{

sb.Append(dtTemp.Columns[k].ColumnName + ',');
}

sb.Append("\r\n");
for (int i = 0; i < dtTemp.Rows.Count; i++)
{
for (int k = 0; k < dtTemp.Columns.Count; k++)
{

sb.Append(dtTemp.Rows[i][k].ToString().Replace(",", ";") + ',');
}

sb.Append("\r\n");
}
Response.Output.Write(sb.ToString());

Response.Flush();

Response.End();


}

http://dotnetzip.codeplex.com/

i want to convert csv file to zip file..how will be that ?.i dnt have any idea..plzz.it is very urgent..i generated csv code from above code..help me any expert? Thanks in advance