Take zip folder and Unzip the file using Ionic Zip Dll

//using Ionic.Zip;

//take one file upload control and click event write

if (FileUpload1.HasFile)
{

String TargetDirectory = FileUpload1.PostedFile.FileName;
using (Ionic.Zip.ZipFile zip1 = Ionic.Zip.ZipFile.Read(TargetDirectory))
{
zip1.ExtractAll(Server.MapPath("UploadFile")
, Ionic.Zip.ExtractExistingFileAction.OverwriteSilently);
}
}