public class Propagator 

{
  // This routine creates a Propagator to propagate the Phases Normal network attribute downstream during a trace
  static void CreatePropagator(UtilityNetworkDefinition utilityNetworkDefinition, TraceConfiguration traceConfiguration)
  {
    const int ABCPhase = 7;
    // Get a NetworkAttribute object for the Phases Normal attribute from the UtilityNetworkDefinition
    using NetworkAttribute normalPhaseAttribute = utilityNetworkDefinition.GetNetworkAttribute("Phases Normal");
    // Create a propagator to propagate the Phases Normal attribute downstream from the source, using a Bitwise And function
    // Allow traversal to continue as long as the Phases Normal value includes any of the ABC phases
    // (represented by the constant ABCPhase)
    Propagator phasePropagator = new Propagator(normalPhaseAttribute, PropagatorFunction.BitwiseAnd,
      Operator.IncludesAny, ABCPhase);

    // Assign this propagator to our trace configuration
    traceConfiguration.Propagators = new List<Propagator>() { phasePropagator };
  }
}