Vfrdtyky

I have an asmx which returns data to a client.
In the asmx I have the following method :

    [WebMethod]

    [XmlInclude(typeof(CustomField))]

    public List<CustomField> GetData(InitializeRequest request)

    {

        return xmlAccessLogic.GetData(request.Map()).Map();

    }

The CustomField is a custom-type I am creating. At this moment it looks as follows:

public class CustomField: Object

{

    public string Key { get; set; }

    public object Value { get; set; }



    public CustomField()

    {

    }



    public CustomField(string key, object value)

    {

        Key = key;

        Value = value;

    }

}

When I get my data, I return it as a List> which is then mapped to a list of my CustomField-object.

When I do the following I get an error :

List<KeyValuePair<string, Object>> clientcollection = new List<KeyValuePair<string, Object>>();

List<KeyValuePair<string, Object>> companiesCollection = new List<KeyValuePair<string, Object>>();



companiesCollection.Add(new KeyValuePair<string, Object>("Count", 1));

companiesCollection.Add(new KeyValuePair<string, Object>("HitsLeft", _hbXmlAccessRepository.GetNumberOfHitsLeft(request.UserName, request.PassWord)));



clientcollection.Add(new KeyValuePair<string, Object>("Vat", generalDataResult.VatNumber));



companiesCollection.Add(new KeyValuePair<string, Object>("firm", clientcollection));



return companiesCollection;

When I don't add the clientCollection to the companiesCollection everything works fine and my clientapplication receives the data.
When I do add the clientCollection, I get an exception.
The exception I get is the following :

System.InvalidOperationException: 'The type System.Collections.Generic.List1[[System.Collections.Generic.KeyValuePair2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Object, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] may not be used in this context.'

What have I forgotten?
I have been looking around and reading, but I didn't find the solution just yet.

(I know my CustomField-object looks like a KeyValuePair, but we have just started and there will be additional fields added to it)

What the client programmer expects, might look as follows:

CompaniesCollection[

    Count="1"

    HitsLeft="248"

    firm[

        Vat=423584152

        Name= "Some Name"

        JurFormID=14

    ]

    firm[

        Vat=42358468

        Name= "Some Other Name"

        JurFormID=14

    ]

]