VS 11 & .NET 4.5

public main()
{
  Console.WriteLine(0x42);
}

c:\windows\assembly\gac_64\MyAssemby\2.0.0.0__ba22423234234234a

XmlTextWriter writer = new XmlTextWriter("c:/test.xml", null);
            
            DirectoryInfo d = new DirectoryInfo("c:/images");
            FileInfo[] files = d.GetFiles("*.jpg");
 

            writer.WriteStartDocument(true);
            writer.WriteStartElement("Images");
 

            for (int i = 0; i < files.Length; i++)
            {
                writer.WriteStartElement("Image");
 

                writer.WriteStartElement("Filename");
                             writer.WriteString(files[i].Name);
                writer.WriteEndElement();
 

                writer.WriteStartElement("FileSize");
                          writer.WriteString(files[i].Length.ToString());
                writer.WriteEndElement();
 

                writer.WriteEndElement();
 

            }
            writer.WriteEndDocument();
            writer.Close();

XElement xml = new XElement("Images",
  from file in files
  select new XElement("Image",
    new XElement("Filename", file.Name),
    new XElement("FileSize", file.Size)
  )
);
xml.Save(path...);

//Get file names from folder
            StringBuilder output = new StringBuilder();
            StorageFolder folder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync("Big");
            IReadOnlyList<StorageFile> file = await folder.GetFilesAsync();
            string r= file.Count.ToString();
            // int i=file.Count;
            foreach (StorageFile file1 in file)
            {
                output.AppendLine(file1.Name);
            }
            this.one.Text = output.ToString();
 
            //Create xml
          XElement xml = new XElement("Images",
          from file1 in file
          select new XElement("Image",
          new XElement("Filename", file1.Name),
          new XElement("FileSize", file1.Size)
  )
);
xml.Save("Data.xml");

Error   1   The best overloaded method match for 'System.Xml.Linq.XDocument.Save(System.IO.Stream, System.Xml.Linq.SaveOptions)' has some invalid arguments
Error   2   Argument 1: cannot convert from 'string' to 'System.IO.Stream'