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 picker, it is located in XML. For more information, see How to: Insert IntelliSense Code Snippets.

Public Class Book
    Public Title As String
End Class

Public Sub WriteXML()
    Dim overview As New Book
    overview.Title = "Serialization Overview"
    Dim writer As New System.Xml.Serialization.XmlSerializer(GetType(Book))
    Dim file As New System.IO.StreamWriter(
    writer.Serialize(file, overview)
End Sub
public class Book
    public String title; 


public 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);

Compiling the Code

The class must have a public constructor without parameters.

Robust Programming

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.

See Also


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



Other Resources

Serialization (C# and Visual Basic)

Serialization (C# and Visual Basic)