Problem to serialize a property that return an interface

[Pol Bawin]

A class has a private field of type IWizard (An interface) and a public
property to access it.
When I try to serialize the Geometry class in XML, i have an error but it
works in Binary

Can you help me

[Serializable]
public class Geometry
{
....
private IWizard _wizard;
public IWizard Wizard
{
get { return _wizard ;}
set { _wizard = value;}
}
}

[MSFT]

The XmlSerializer has to have an instantiated object during serialization.
For an interface, however, it would not know what type to instantiate.
Working around this limitation, you can use an abstract base class to
express the semantics of your interface. For example:

public abstract class IWizard
{
public abstract int x
{
get;
set;
}
}
[Serializable]
public class Geometry
{
private IWizard _wizard;
public IWizard Wizard
{
get { return _wizard ;}
set { _wizard = value;}
}
}

Luke
Microsoft Online Support

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