Why can't I send my custom class through my webservice?

Question

I have these classes:

public abstract class CustomField
{
    public String Id { get; set; }
    public String Name { get; set; }
    public String Description { get; set; }
    public FieldType Type { get; set; } 

    public enum FieldType
    { 
        String = 0,
        Integer = 1,
        Boolean = 2,
        List = 3
    }
}

public class StringCustomField:CustomField
{
    public String Value { get; set; }
    public Int32 MinLenght { get; set; }
    public Int32 MaxLenght { get; set; }

    public StringCustomField()
    {
        this.Type = FieldType.String;
    }
}

public class CustomGroup
{
    public String Id { get; set; }
    public String Name { get; set; }
    public String Description { get; set; }
    public List<CustomField> FieldList = new List<CustomField>();
}

When I try to transfer CustomGroup through my webservice I get this error:

The remote server returned an error: NotFound

Serialization is failing when C# tries to transfer my StringField through my CustomField.

What am I doing wrong?

Marc Gravel tell me to do that and i understand the solution but some thing is wrong, no effects, cath the same error!! , help!!

[XmlInclude(typeof(StringCustomField))]
[XmlInclude(typeof(IntegerCustomField))]
[XmlInclude(typeof(BooleanCustomField))]
[XmlInclude(typeof(ListCustomField))]
public abstract class CustomField
{
    public String Id { get; set; }
    public String Name { get; set; }
    public String Description { get; set; }
    public FieldType Type { get; set; } 

    public enum FieldType
    { 
        String = 0,
        Integer = 1,
        Boolean = 2,
        List = 3
    }
}

Answer 1

List<CustomField> will serialize and deserialize to a CustomField[] if you're using a web service, won't it?

Answer 2

use

public class CustomGroup
{
    public String Id { get; set; }
    public String Name { get; set; }
    public String Description { get; set; }
    public List<CustomField> FieldList = new List< StringCustomField >();

}

instead

Answer 3

If you are sending subclasses as xml, you will need [XmlInclude]:

[XmlInclude(typeof(StringCustomField))]
public abstract class CustomField
{...}

You can add multiple [XmlInclude(...)] markers for any other subclasses in the model.

Answer 4

If i understand you correctly, you should 1. connect your web service to your app 2. use the namespace of the WS, so all the classes will be used from the Proxy i don't think that the local class will be understood by the remote web serivce correctly, even if you're using the same assembly on both parties