private OperationHandle EnumerateInstancesCore(string namespaceName, string className, CimOperationOptions options, CimAsyncCallbacksReceiverBase asyncCallbacksReceiver) { OperationHandle operationHandle = null; SessionMethods.EnumerateInstances(this._handle, options.GetOperationFlags(), options.GetOperationOptionsHandle(), namespaceName, className, options.GetKeysOnly(), options.GetOperationCallbacks(asyncCallbacksReceiver), out operationHandle); return operationHandle; }