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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 Module XMLWrite

    Sub Main()
        WriteXML()
    End Sub 

    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(
            "c:\temp\SerializationOverview.xml")
        writer.Serialize(file, overview)
        file.Close()
    End Sub 
End Module

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.

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