public IReadOnlyList<Field> GetSubcircuitUserFields()

await QueuedTask.Run(() =>
{
  using (CircuitManager circuitManager = utilityNetwork.GetCircuitManager(telecomDomainNetwork))
  {
    // Create a non-sectioned circuit object
    Circuit circuit = new Circuit(circuitManager);
    circuit.SetName(circuitNames.First());
    circuit.SetSectioned(false);
    circuit.SetCircuitType(CircuitType.Physical);

    // Set a circuit user attribute
    IReadOnlyList<Field> circuitFields = circuitManager.GetCircuitUserFields();
    circuit[circuitFields.First().Name] = "My circuit description";

    // Add start and stop locations
    circuit.SetStartLocation(new CircuitLocation(startElement));
    circuit.SetStopLocation(new CircuitLocation(stopElement));

    Subcircuit subcircuit1 = new Subcircuit(circuitManager);
    subcircuit1.SetName("Subcircuit1");

    // Set a subcircuit user attribute
    IReadOnlyList<Field> subcircuitFields = circuitManager.GetSubcircuitUserFields();
    subcircuit1[subcircuitFields[0].Name] = "My subcircuit description";

    Subcircuit subcircuit2 = new Subcircuit(circuitManager);
    subcircuit2.SetName("Subcircuit2");
    subcircuit2.SetProviderID(new Guid("9B587BB4-FA30-4AC8-ACAC-4CB1BB087111")); // Example GUID 

    // Add subcircuits to the circuit
    circuit.SetSubcircuits(new List<Subcircuit> {
                  subcircuit1,
                  subcircuit2
        });

    // Create the circuit.

    circuitManager.Create(circuit);

  }

});