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XmlSerializer.Deserialize Method (TextReader)


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Deserializes the XML document contained by the specified TextReader.

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

public object Deserialize(
	TextReader textReader


Type: System.IO.TextReader

The TextReader 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.

Classes that inherit from TextReader include StringReader and StreamReader. If you are using a StreamReader to deserialize an object, you must construct the StreamReader with an appropriate Encoding. The encoding specified by the XML document is ignored.


To use the encoding specified by the XML document, use the Deserialize overload that takes an XmlReader instead. 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 a TextReader object.

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

// This is the class that will be deserialized.
public class OrderedItem
    [XmlElement(Namespace = "")]
    public string ItemName;
    [XmlElement(Namespace = "")]
    public string Description;
    [XmlElement(Namespace = "")]
    public decimal UnitPrice;
    [XmlElement(Namespace = "")]
    public int Quantity;
    [XmlElement(Namespace = "")]
    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()
      Test t = new Test();
      // Read a purchase order.
   private void DeserializeObject(string filename)
      Console.WriteLine("Reading with TextReader");

      // Create an instance of the XmlSerializer specifying type.
      XmlSerializer serializer = 
      new XmlSerializer(typeof(OrderedItem));

      // Create a TextReader to read the file. 
      FileStream fs = new FileStream(filename, FileMode.OpenOrCreate);
      TextReader reader = new StreamReader(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" +

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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