Question

For example I want to remove or change below property attributes or add a new one. Is it possible?

[XmlElement('bill_info')] [XmlIgnore] public BillInfo BillInfo {   get { return billInfo; }   set { billInfo = value; } } 

Answer 1

(edit – I misread the original question)

You cannot add actual attributes (they are burned into the IL); however, with XmlSerializer you don’t have to – you can supply additional attributes in the constructor to the XmlSerializer. You do, however, need to be a little careful to cache the XmlSerializer instance if you do this, as otherwise it will create an additional assembly per instance, which is a bit leaky. (it doesn’t do this if you use the simple constructor that just takes a Type). Look at XmlAttributeOverrides.

For an example:

using System; using System.Xml.Serialization;  public class Person {     static void Main()     {         XmlAttributeOverrides overrides = new XmlAttributeOverrides();         XmlAttributes attribs = new XmlAttributes();         attribs.XmlIgnore = false;         attribs.XmlElements.Add(new XmlElementAttribute('personName'));         overrides.Add(typeof(Person), 'Name', attribs);          XmlSerializer ser = new XmlSerializer(typeof(Person), overrides);         Person person = new Person();         person.Name = 'Marc';         ser.Serialize(Console.Out, person);     }     private string name;     [XmlElement('name')]     [XmlIgnore]     public string Name { get { return name; } set { name = value; } } } 

Note also; if the xml attributes were just illustrative, then there is a second way to add attributes for things related to data-binding, by using TypeDescriptor.CreateProperty and either ICustomTypeDescriptor or TypeDescriptionProvider. Much more complex than the xml case, I’m afraid – and doesn’t work for all code – just code that uses the component-model.