WCF service And Linq - linq

Question

I am using LINQ in a WCF service. I am trying to list all my movies in a grid but my query wont work.
any of you know why?
this is the query:
public List<MovieInfo> GetAllMovies()
{
var queryResult = (from x in db.MovieInfos
select x);
return queryResult.ToList();
}
This is the webconfig:
<configuration>
<connectionStrings>
<add
name="dmaa0913Sem3_1ConnectionString"
connectionString="Data Source=dbname;Initial Catalog=dataname;Persist Security Info=True;User ID=username;Password=password"
providerName="System.Data.SqlClient" />
</connectionStrings>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5"/>
</system.web>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information, set the values below to false before deployment -->
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<protocolMapping>
<add binding="basicHttpsBinding" scheme="https" />
</protocolMapping>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
<!--
To browse web app root directory during debugging, set the value below to true.
Set to false before deployment to avoid disclosing web app folder information.
-->
<directoryBrowse enabled="true"/>
</system.webServer>
</configuration>
here is the error i get:
Failed to invoke the service. Possible causes: The service is offline
or inaccessible; the client-side configuration does not match the
proxy; the existing proxy is invalid. Refer to the stack trace for
more detail. You can try to recover by starting a new proxy, restoring
to default configuration, or refreshing the service.
The service is online, because i use WCF test client.

Answer 1

I have solved the problem. The query that i use for extracting data from the database i somthing called lazyloading. And WCF have trouble working with this kind of query if the data that need's to be extracted is to complex. It is somthing about how WCF service serialize the service. So what i did to make it work was to go in the Linq datacontex and set the. Serialization Mode to Unidirectional. This worked for me.