I am running the sample code from Cortego and running into the exception below. I am trying to set a hardcoded password to a workflow to be sent to a parameter in the next synchronization rule activity. I set the destination as [//WorkflowData/mfdsPassword]. Running the code and setting up the debugger, I get the exception. I have also tried the original WorkflowDictionary line of containingWorkflow.WorkflowDictionary[destinationAttribute] = password; System.ArgumentNullException: Value cannot be null. Parameter name: collection at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) at Microsoft.ResourceManagement.Workflow.Hosting.RequestWorkItemProcessor.ProcessPutWorkItem(UpdateRequestWorkItem updateWorkItem) at Microsoft.ResourceManagement.Workflow.Hosting.RequestWorkItemProcessor.ProcessWorkItem(WorkItem workItem) void cGeneratePassword_ExecuteCode(object sender, EventArgs e) { // Try to get parent workflow. SequentialWorkflow containingWorkflow = null; if (!SequentialWorkflow.TryGetContainingWorkflow(this, out containingWorkflow)) { throw new InvalidOperationException("Could not get parent workflow!"); } string password = "Password05"; // Separate destination and destination attribute. string destination = Utils.ExtractWorkflowExpression(Destination, Utils.ExpressionParts.WorkflowParameter); string destinationAttribute = Utils.ExtractWorkflowExpression(Destination, Utils.ExpressionParts.ParameterAttribute); if (!string.IsNullOrEmpty(destinationAttribute)) { if (destination.ToLower() == "workflowdata") { // Write output value to WorkflowDictionary. if (containingWorkflow != null) { containingWorkflow.WorkflowDictionary.Add("mfdsPassword", password); } } } } protected override ActivityExecutionStatus HandleFault(ActivityExecutionContext executionContext, Exception exception) { return base.HandleFault(executionContext, exception); }

I am not sure, but it is now working. I put 'containingWorkflow.WorkflowDictionary[destinationAttribute] = password;' back in the code and things are now working. Sorry I do not have a solution for anyone but if I find out, I will post.