How to decompress GZ files for windows phone 8

public static void Decompress(FileInfo fileToDecompress)
       {
           using (FileStream originalFileStream = fileToDecompress.OpenRead())
           {
               string currentFileName = fileToDecompress.FullName;
               string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);

               using (FileStream decompressedFileStream = File.Create(newFileName))
               {
                   using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))
                   {
                       decompressionStream.CopyTo(decompressedFileStream);
                       Console.WriteLine("Decompressed: {0}", fileToDecompress.Name);
                   }
               }

           }
       }