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POAbstract objects collection definition in wcf service
 

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    <p>I have in my DataContract a collection of objects defined as</p> <pre><code>Collection&lt;BaseAbstractObject&gt; </code></pre> <p>which I want to fill up with some inherited objects of type <strong>ClassA</strong>. </p> <p>I'm using Soap UI to create such a request to my service method, but I'll get error <strong><em>"Cannot create an abstract class"</em></strong></p> <p>I have also decorated base class with <strong>[KnownType(ClassA)]</strong> attribute. My xml request looks like this:</p> <pre><code>&lt;soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/" xmlns:wcf="http://schemas.datacontract.org/2004/07/WcfService1" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"&gt; &lt;soapenv:Header/&gt; &lt;soapenv:Body&gt; &lt;tem:GetDataUsingDataContract&gt; &lt;tem:composite&gt; &lt;wcf:ClassesCollection&gt; &lt;wcf:BaseClass i:type="ClassA" &gt; &lt;wcf:Id&gt;1&lt;/wcf:Id&gt; &lt;wcf:Name&gt;ClassA&lt;/wcf:Name&gt; &lt;/wcf:BaseClass&gt; &lt;/wcf:ClassesCollection&gt; &lt;/tem:composite&gt; &lt;/tem:GetDataUsingDataContract&gt; &lt;/soapenv:Body&gt; &lt;/soapenv:Envelope&gt; </code></pre> <p>And this is how my DataContracts looks like:</p> <pre><code>[DataContract] public class MyDataContract { public MyDataContract() { ClassesCollection = new Collection&lt;BaseClass&gt;(); } [DataMember] public Collection&lt;BaseClass&gt; ClassesCollection { get; private set; } } [DataContract] [KnownType(typeof(ClassA))] public abstract class BaseClass { [DataMember] public int Id { get; set; } } [DataContract] public class ClassA : BaseClass { [DataMember] public int Name { get; set; } } </code></pre> <p>So what should my request looks like? Or need I add some other attribute to DataContract?</p>
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