How to add attributes for C# XML Serialization

Where do you have the type stored?

Normally you could have something like:

class Document {
    [XmlAttribute("type")]
    public string Type { get; set; }
    [XmlText]
    public string Name { get; set; }
}


public class _Filter    
{
    [XmlElement("Times")]    
    public _Times Times;    
    [XmlElement("Document")]    
    public Document Document;    
}

The string class doesn't have a type property, so you can't use it to create the desired output. You should create a Document class instead :

public class Document
{
    [XmlText]
    public string Name;

    [XmlAttribute("type")]
    public string Type;
}

And you should change the Document property to type Document

It sounds like you need an extra class:

public class Document
{
    [XmlAttribute("type")]
    public string Type { get; set; }
    [XmlText]
    public string Name { get; set; }
}

Where an instance (in the example) would have Type = "word" and Name = "document name"; documents would be a List<Document>.

By the way - public fields are rarely a good idea...