How can I return a class that has class list inside of it from WCF restful web service

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C#

REST

WCFServices

Hi;

I want to return a MobileResult class from my WCF Rest web service on every OperationContract that return value.

I can do this with classes that has no class list inside of it. But when I return a class that has class list inside of it it doesn't serialize the class.

So, how can I return a class that has class list inside of it? Or can I do this?

Thank you.

What I have tried:

My MobileResult class;

[KnownType(typeof(SomeClass))]
[KnownType(typeof(AnotherClass))]
[DataContract]
[Serializable]
public class MobileResult
{
    [DataMember]
    public bool result { get; set; }
    [DataMember]
    public object data { get; set; }

    public MobileResult(bool res, object obj)
    {
        result = res;
        data = obj;
    }
}

My SomeClass, this class can serialize perfectly;

public class SomeClass
{
    public int ID { get; set; }
    public string Name { get; set; }
}

My AnotherClass, this class doesn't serialize;

public class AnotherClass
    {
        public int ID { get; set; }
        public string Title { get; set; }
        public virtual ICollection<SomeClass> Classes{ get; set; }

        public AnotherClass{ Classes = new HashSet<SomeClass>(); }
    }

Operation Contract;

[OperationContract]
        [WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "GetAnotherClass/{number}")]
        MobileResult GetAnotherClass(string number);

public MobileResult GetAnotherClass(string number)
        {
            try
            {
                AnotherClass aClass = new AnotherClass();
                aClass.ID = 5;
                aClass.Title = "MyTitle";
                aClass.Classes = GetClasses();
 
                return new MobileResult(true, aClass);
            }
            catch
            {
                return null;
            }
        }