We recommend using Visual Studio 2017
This documentation is archived and is not being maintained.

How to: Write Object Data to an XML File (C# and Visual Basic)

This example writes the object from a class to an XML file using the XmlSerializer class.

This code example defines a class named Book, creates an instance of the class, and uses XML serialization to write the instance to an XML file.

Code similar to this is available as an IntelliSense code snippet. In the Code Snippet Manager, it is located in XML. For more information, see Code Snippets.

public class XMLWrite

   static void Main(string[] args)

    public class Book
        public String title; 

    public static void WriteXML()
        Book overview = new Book();
        overview.title = "Serialization Overview";
        System.Xml.Serialization.XmlSerializer writer = 
            new System.Xml.Serialization.XmlSerializer(typeof(Book));

        System.IO.StreamWriter file = new System.IO.StreamWriter(
        writer.Serialize(file, overview);

The class must have a public constructor without parameters.

The following conditions may cause an exception:

This example creates a new file, if the file does not already exist. If an application needs to create a file, that application needs Create access for the folder. If the file already exists, the application needs only Write access, a lesser privilege. Where possible, it is more secure to create the file during deployment, and only grant Read access to a single file, rather than Create access for a folder.