Calling WCF service, exposed on Azure Service Bus, directly in a sandboxed plugin

Hello Devs,

Is there any way to call a WCF service, exposed to a Azure Service Bus Relay, directly in a sandboxed plugin code? That is without using provided Service Endpoint entity. Basically, I don't want to pass over full data context (IPluginExecutionContext) to the WCF service that is not CRM aware.

I googled for calling a WCF service in a sandboxed plugin and found that it is possible. However, when I am trying to access a service bus relay hosted service, it is ending up with error:

The type initializer for 'Microsoft.ServiceBus.RelayEnvironment' threw an exception

with an inner exception message:

Request for the permission of type 'System.Security.Permissions.EnvironmentPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed

Below is my sample plugin code:

string serviceNamespace = "myNameSpace";
string issuerName = "RootManageSharedAccessKey";
string issuerKey = "myKey";

string servicePath = "Student/GetInfo";

var cf = new ChannelFactory<IStudentInfo>(
	new WS2007HttpRelayBinding(),
	new EndpointAddress(ServiceBusEnvironment.CreateServiceUri(Uri.UriSchemeHttps, serviceNamespace, servicePath)));

cf.Endpoint.Behaviors.Add(new TransportClientEndpointBehavior
{
	TokenProvider = TokenProvider.CreateSharedAccessSignatureTokenProvider(issuerName, issuerKey)
	//TokenProvider = TokenProvider.CreateSharedSecretTokenProvider(issuerName, issuerKey)
});

var ch = cf.CreateChannel();

blog: <a href="http://technologynotesforyou.wordpress.com">http://technologynotesforyou.wordpress.com</a> | skype: ali.net.pk