public MexInstanceContextProvider (ServiceHostBase service_host)
{
foreach (IServiceBehavior beh in service_host.Description.Behaviors) {
ServiceMetadataBehavior mex_beh = beh as ServiceMetadataBehavior;
if (mex_beh == null)
continue;
MetadataExchange mex_instance = new MetadataExchange (mex_beh);
ctx = new InstanceContext (mex_instance);
break;
}
//if (ctx == null)
}