public IReadOnlyList<FunctionBarrier> FunctionBarriers {get; set;}

{
  // This routine creates a FunctionBarrier that stops traversal when the total shape length exceeds 1000 feet
  static void CreateFunctionBarrier(UtilityNetworkDefinition utilityNetworkDefinition, TraceConfiguration traceConfiguration)
  {
    // Create a NetworkAttribute object for the Shape length network attribute from the UtilityNetworkDefinition
    using NetworkAttribute shapeLengthNetworkAttribute = utilityNetworkDefinition.GetNetworkAttribute("Shape length");
    // Create a function that adds up shape length
    Add lengthFunction = new Add(shapeLengthNetworkAttribute);

    // Create a function barrier that stops traversal after 1000 feet
    FunctionBarrier distanceBarrier = new FunctionBarrier(lengthFunction, Operator.GreaterThan, 1000.0);

    // Set this function barrier
    traceConfiguration.Traversability.FunctionBarriers = new List<FunctionBarrier>() { distanceBarrier };
  }
}