I downloaded the sample apps but they don't seem to have changed. Have you updated them; if so can you send me the correct link.
In any case, the sample app that demonstrates collections no longer works. When I run it, I'm getting the following exception:
System.Activities.InvalidWorkflowException was unhandled
Message=The following errors were encountered while processing the workflow tree:
'Literal<ICollection<Int32>>': Literal only supports value types and the immutable type System.String. The type System.Collections.Generic.ICollection`1[System.Int32] cannot be used as a literal.
at System.Activities.Validation.ActivityValidationServices.ThrowIfViolationsExist(IList`1 validationErrors)
at System.Activities.Hosting.WorkflowInstance.ValidateWorkflow(WorkflowInstanceExtensionManager extensionManager)
at System.Activities.Hosting.WorkflowInstance.RegisterExtensionManager(WorkflowInstanceExtensionManager extensionManager)
at System.Activities.WorkflowApplication.RunInstance(WorkflowApplication instance)
at System.Activities.WorkflowApplication.Invoke(Activity activity, IDictionary`2 inputs, WorkflowInstanceExtensionManager extensions, TimeSpan timeout)
View Complete Post