XMLSerializer - There was an error generating the XML document.

[Riley Phelps]

When I use the XML Serializer in the following example, the first Serialize (with the class Pets) works, but the second (with the cplaa Pets2) fails. Which arrtubute nedds to be applied to make the second Serialize work
namespace SerializeTes

public class Class

[STAThread
static void Main(string[] args

Test _test = new Test()
_test.TestAnima l()
public class Tes

public void TestAnimal(

Pets newPets = new Pets()

newPets.MyCat = new Cat()
newPets.MyCat.C laws = "shapr"
newPets.MyCat.N ame = "Fluffy"
newPets.MyCat.W eight = 5

newPets.MyDog = new Dog()
newPets.MyDog.T rimmed = true
newPets.MyDog.N ame = "Spot"
newPets.MyDog.W eight = 10

Pets2 newPets2 = new Pets2()
newPets2.MyPet = new Cat()
((Cat)newPets2. MyPet).Claws = "Trimmed"
((Cat)newPets2. MyPet).Name = ""
((Cat)newPets2. MyPet).Weight = 6

//This will serializ
XmlTextWriter xtw = new XmlTextWriter(@ "E:\Pets.xm l", Encoding.UTF8)
XmlSerializer xs = new XmlSerializer(t ypeof(Pets))
xs.Serialize(xt w, newPets)
xtw.Close()

//This will fail with the following messag
//An unhandled exception of type 'System.Invalid OperationExcept ion' occurred in system.xml.dl
/
//Additional information: There was an error generating the XML document
/
XmlTextWriter xtw2 = new XmlTextWriter(@ "E:\Pets2.x ml", Encoding.UTF8)
XmlSerializer xs2 = new XmlSerializer(t ypeof(Pets2))
xs.Serialize(xt w2, newPets2)
xtw2.Close()


[XmlRoot
public abstract class Anima

private string _name
private int _weight

public string Nam

ge

return _name

se

_name = value
public int Weigh

ge

return _weight

se

_weight = value


public class Cat : Anima

private string _claws

public string Claw

ge

return _claws

se

_claws = value


public class Dog : Anima

private bool _trimmed

public bool Trimme

ge

return _trimmed

se

_trimmed = value


public class Pet

private Cat _myCat
private Dog _myDog

public Cat MyCa

ge

return _myCat

se

_myCat = value

public Dog MyDo

ge

return _myDog

se

_myDog = value


public class Pets

private Animal _myPet

public Animal MyPe

ge

return _myPet

se

_myPet = value