Although this issue came up in the web service, I believe it is related to
serialization in general.

This is my web service interface definition:

========

public class HistoryAttribute
   {
       private int key;
       private string value;

       public HistoryAttribute()
       {
           key = -1;
           value = string.Empty;
       }

       public HistoryAttribute(int key, string value)
       {
           this.key = key;
           this.value = value;
       }
   }

   [WebServiceBinding(
       Name = "ReportService",
       Namespace = "http://PC.WS2",
       ConformsTo = WsiProfiles.BasicProfile1_1,
       EmitConformanceClaims = true)]
   interface IProHistoryService
   {
       [WebMethod]
       void Record(HistoryAttribute[] attributeList);
   }

===================

HistoryAttribute class has parameterized constructor:

       public HistoryAttribute(int key, string value)
       {
           this.key = key;
           this.value = value;
       }

Everything compiles fine, but when a proxy class is generated by WSDL
utility, this constructor is missing:

=======================

  [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "2.0.50727.42")]
   [System.SerializableAttribute()]
   [System.Diagnostics.DebuggerStepThroughAttribute()]
   [System.ComponentModel.DesignerCategoryAttribute("code")]
   [System.Xml.Serialization.XmlTypeAttribute(Namespace="http://PC.WS2")]
   public partial class HistoryAttribute {

       private int keyField;
       private string valueField;

   }
=============

Only first, default constor is there, and again, no error or warrnings.

I tried to hack it and put parameterized constructo manually, but then I got
an error message during calling the webservice.

I want parameterized constructor because

oProxy.Record (new HistoryAttribute[]
                         {
                               new HistoryAttribute (1, "abc"),
                               new HistoryAttribute (2, "xyz")
                          })

is shorter than

HistoryAttribute at1 = new HistoryAttribute(1, "abc");
HistoryAttribute at2 = new HistoryAttribute(21, "xyz");

oProxy.Record (new HistoryAttribute[]
                         {
                              at1, at2
                          })

Is there a way around it? Perhaps there is an attribute I need to use?

Thanks,

-Stan