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    <p>Are your entities marked with a <code>DataContract</code> attribute? Are you making sure that they are serializable?</p> <p><strong>EDIT:</strong> By looking at your code it seems that you are using your entities directly. This is not a good practice because (even if your code was working) I don't think you want extra properties like the ones that Entity Framework auto-generates.</p> <p>In these case you should consider to use DTOs (Data Transfer Objects), this is an example of how <code>Newspaper</code> class could be:</p> <pre><code>[DataContract] public class NewspaperDTO { public NewspaperDTO(Newspaper newspaper) { this.Name = newspaper.Name; this.Image = newspaper.Image; this.Link = newspaper.Link; this.Encoding = newspaper.Encoding; } [DataMember] public string Name { get; set; } [DataMember] public string Image { get; set; } [DataMember] public string Link { get; set; } [DataMember] public string Encoding { get; set; } } </code></pre> <p>And then in your service:</p> <pre><code>public List&lt;NewspaperDTO&gt; GetNews() { return entities.Newspapers.Select(a =&gt; new NewspaperDTO(a)).ToList(); } </code></pre> <p>P. S. I have noticed that your entities are not disposed (inside the WCF service I mean). You should consider using a pattern like this in every method of your service:</p> <pre><code>public List&lt;NewspaperDTO&gt; GetNews() { using (var entities = new MyEntities()) { return entities.Newspapers.Select(a =&gt; new NewspaperDTO(a)).ToList(); } } </code></pre>
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    1. POWhy does my WCF Service not use my Entity Model?
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    1. COAs you can see from my second Screenshot, GetAuthors method which returns the Authors is working fine whereas GetNewspapers method is not working. What I have seen is that if I create my Entity Object from "Entity Model Self-Tracking Object Generator", everything works fine. However, this time, when I try to publish my service with REST services over webHttpBinding, It doesn't serialize/deserialize my object as json object even though I fill ResponseFormat. Btw, It works fine if I want to serialize/deserialize as XML but again entity object should be generated by "Self-Tracking Object Gen."
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    2. COTo your both question, my answer is yes by the way.
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    3. COIt is a bit difficult for me to understand what is going on. Even if you have posted the class diagram I am not sure of what is happening on the background. Try to link me a zipped solution of your problem and I will take a look ;)
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