XmlSerializer.Deserialize Method (XmlReader)


Deserializes the XML document contained by the specified XmlReader.

Namespace:   System.Xml.Serialization
Assembly:  System.Xml (in System.Xml.dll)

public object Deserialize(
	XmlReader xmlReader


Type: System.Xml.XmlReader

The XmlReader that contains the XML document to deserialize.

Return Value

Type: System.Object

The Object being deserialized.

Exception Condition

An error occurred during deserialization. The original exception is available using the InnerException property.

Deserialization is the process of reading an instance of an XML document and constructing an object that is strongly typed to the XML Schema (XSD) of the document.

Before deserializing, an XmlSerializer must be constructed using the type of the object that is being deserialized.

The XmlReader automatically detects and uses the encoding specified by the XML document.


The XmlSerializer cannot deserialize the following: arrays of ArrayList and arrays of List<T>.

The following example deserializes an object using an XmlReader.

using System;
using System.IO;
using System.Text;
using System.Xml;
using System.Xml.Serialization;

// This is the class that will be deserialized.
public class OrderedItem
    public string ItemName;
    public string Description;
    public decimal UnitPrice;
    public int Quantity;
    public decimal LineTotal;

    // A custom method used to calculate price per item.
    public void Calculate()
        LineTotal = UnitPrice * Quantity;
public class Test
    public static void Main(string[] args)
        Test t = new Test();
        // Read a purchase order.

    private void DeserializeObject(string filename)
        Console.WriteLine("Reading with XmlReader");

        // Create an instance of the XmlSerializer specifying type and namespace.
        XmlSerializer serializer = new

        // A FileStream is needed to read the XML document.
        FileStream fs = new FileStream(filename, FileMode.Open);
        XmlReader reader = XmlReader.Create(fs);

        // Declare an object variable of the type to be deserialized.
        OrderedItem i;

        // Use the Deserialize method to restore the object's state.
        i = (OrderedItem)serializer.Deserialize(reader);

        // Write out the properties of the object.
        i.ItemName + "\t" +
        i.Description + "\t" +
        i.UnitPrice + "\t" +
        i.Quantity + "\t" +
<?xml version="1.0"?>
 <OrderedItem xmlns:inventory="http://www.cpandl.com" xmlns:money="http://www.cohowinery.com">
   <inventory:Description>Regular Widget</inventory:Description>

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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