How to define behave during serialization an object to attribute in XML

I have some problem with serialization an object to XML. At the beggining, this is class Order which have some properties of types like string, int...

public class Order
{
    [XmlAttribute("ObjectType")]
    public string TypeName
    {
        get; set;
    }

    [XmlAttribute("ID")]
    public string ID
    {
        get; set;
    }

    [XmlAttribute("TID")]
    public string TID
    {
        get; set;
    }

    [XmlAttribute("Command")]
    public Command Command
    {
        get; set; 
    }

    public Order()
    {

    }
}

As you can see, this class has also one property of type Command. Command class has one property of type string called Name:

public class Command
{
    [XmlAttribute("Name")]
    public string Name
    {
        get; set;
    }
}

What's the problem? I need to get result like this:

<Order ObjectType="TestCase" ID="2" TID="W404" Command="SomeCommand" />

Where 'SomeCommand' is value of 'Name' property of this Command object.

With simple words: i need to define behave of how Command object should be serialized to XML attribute - return Name string. Very important thing is that also I have to be able to deserialize this XML to objects structure.

Hope my post is understandable and my problem is explained clearly. ;)

Best regards!