public Activity Resolve(string id)
{
Fx.Assert(id != null, "id should not be null.");
Activity activityRoot = null;
if (this.workflowService != null)
{
activityRoot = this.workflowService.GetWorkflowRoot();
}
else
{
activityRoot = this.activity;
}
return(ActivityValidationServices.Resolve(activityRoot, id));
}