C# load android package(.apk) manifest to string

1 using AndroidXml;
2 using System.IO.Compression;

 1         static string GetAndroidManifestStrings(string szfile) {
 2             const string SZ_MANIFEST = "AndroidManifest.xml";
 3             string pszret = null;
 4             using (FileStream pfstm = new FileStream(szfile, FileMode.Open, FileAccess.Read, FileShare.Read)) {
 5                 using (ZipArchive parc = new ZipArchive(pfstm)) {
 6                     ZipArchiveEntry pety = parc.GetEntry(SZ_MANIFEST);
 7                     using (Stream pestm = pety.Open()) {
 8                         using (MemoryStream pmstm = new MemoryStream()) {
 9                             pestm.CopyTo(pmstm);
10                             pmstm.Seek(0, SeekOrigin.Begin);
11                             AndroidXmlReader prdr = new AndroidXmlReader(pmstm);
12                             XDocument pxdoc = XDocument.Load(prdr);
13                             pszret = pxdoc.ToString();
14                         }
15                     }
16                 }
17             return pszret;
18         }