public sealed class NetworkAttributeComparison : ConditionalExpression 

{
  static void CreateNetworkAttributeComparison(UtilityNetworkDefinition utilityNetworkDefinition, TraceConfiguration traceConfiguration)
  {
    // This routine creates a NetworkAttributeComparison to compare the Lifecycle network attribute against two values: "In Design" and "In Service"

    const int InDesign = 4;
    const int InService = 8;

    // Create a NetworkAttribute object for the Lifecycle network attribute from the UtilityNetworkDefinition
    using NetworkAttribute lifecycleNetworkAttribute = utilityNetworkDefinition.GetNetworkAttribute("Lifecycle");
    // Create a NetworkAttributeComparison that stops traversal if Lifecycle <> "In Design" (represented by the constant InDesign)
    NetworkAttributeComparison inDesignNetworkAttributeComparison =
      new NetworkAttributeComparison(lifecycleNetworkAttribute, Operator.NotEqual, InDesign);

    // Create a NetworkAttributeComparison to stop traversal if Lifecycle <> "In Service" (represented by the constant InService)
    NetworkAttributeComparison inServiceNetworkAttributeComparison =
      new NetworkAttributeComparison(lifecycleNetworkAttribute, Operator.NotEqual, InService);

    // Combine these two comparisons together with "And"
    And lifecycleFilter = new And(inDesignNetworkAttributeComparison, inServiceNetworkAttributeComparison);

    // Final condition stops traversal if Lifecycle <> "In Design" and Lifecycle <> "In Service"
    traceConfiguration.Traversability.Barriers = lifecycleFilter;
  }
}