Question

we currently set WCF RIA Services Link from the Silverlight client, I currently looking for the config file to changes some wcf settings. Is that possible?

Answer 1

You need to add appropriate settings and behaviors to your service endpoints.

Here is an example of an endpoint behavior that increases maxItemsInObjectGraph:

<endpointBehaviors>
    <behavior name="ClientMaxItemsInObjectGraphBehavior">
        <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
    </behavior>
</endpointBehaviors>

It is referenced using behaviorConfiguration= in an endpoint like this:

<endpoint contract="AssemblyName.IContactName" 
    address="http://localhost:50101/MyService.svc"
    behaviorConfiguration="ClientMaxItemsInObjectGraphBehavior"
    binding="wsHttpBinding" 
    bindingConfiguration="WSHttpBinding_Default"
    name="MyServiceEndpoint">
</endpoint>

Most of the other settings relate to the service binding which was referenced by bindingConfiguration= e.g.:

<system.serviceModel>
    <bindings>
        <wsHttpBinding>
            <binding name="WSHttpBinding_Default"
            maxBufferPoolSize="2147483647" 
            maxReceivedMessageSize="2147483647"
                      <readerQuotas maxDepth="32" 
                            maxStringContentLength="2147483647" 
                            maxArrayLength="16384"
                            maxBytesPerRead="4096" 
                            maxNameTableCharCount="16384" />
            </binding>

It is probably easier to study the matching classes and properties than the config files. Configs get messy very fast, but they just reflect a hierarchy of properties at run-time so working backwards from the class documentation may help you understand where the various settings go.