Question

I have little Silverlight app that needs to make queries to server, is it possible to return objects to silverlight app or how can I communicate with server?

Answer 1

Use a WCF Service. As long as your objects are Serializable, the runtime will encode and decode them for you transparently.

A simple Silverlight-enabled WCF service looks something like this:

using System.ServiceModel;
using System.ServiceModel.Activation;

[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode =
    AspNetCompatibilityRequirementsMode.Allowed)]
public class YourService
{
    [OperationContract]
    public string DoStuff(string arg)
    {
        return arg + "stuff";
    }
}

You can replace “string” with your datatype by creating a [DataContract].