public sealed class TelecomDomainNetwork : ArcGIS.Core.Data.UtilityNetwork.DomainNetwork 

await QueuedTask.Run(() =>
{
  if (!utilityNetwork.HasTelecomNetwork)
  {
    Console.WriteLine("The utility network does not have a telecom domain network.");
  }

  // Get the telecom domain network from the utility network definition.
  IReadOnlyList<DomainNetwork> domainNetworks = utilityNetwork.GetDefinition().GetDomainNetworks();
  foreach (DomainNetwork domainNetwork in domainNetworks)
  {
    if (domainNetwork is TelecomDomainNetwork tdn)
    {
      // The telecom domain network was found.
      telecomDomainNetwork = tdn;

      // Get information about circuit properties from the telecom domain network.
      CircuitProperties circuitProperties = telecomDomainNetwork.CircuitProperties;
      Console.WriteLine($"Maximum hops in a circuit: {circuitProperties.MaxHops}");
      Console.WriteLine($"Number of paths in a circuit: {circuitProperties.NumPaths}");

      // Get the circuit color scheme information
      IReadOnlyList<ColorScheme> colorSchemes = telecomDomainNetwork.ColorSchemes;
      foreach (ColorScheme colorScheme in colorSchemes)
      {
        string colorSchemeName = colorScheme.Name;
        int colorSchemeID = colorScheme.ID;

        IReadOnlyList<ColorSchemeGroup> colorSchemeGroups = colorScheme.Groups;
        foreach (ColorSchemeGroup group in colorSchemeGroups)
        {
          Console.WriteLine($"Color Scheme: {colorSchemeName}, Group: {group.Name}");

          // Color codes
          IReadOnlyList<ColorCode> colorCodes = group.ColorCodes;
          foreach (ColorCode colorCode in colorCodes)
          {
            Console.WriteLine($"Color Code: {colorCode}");
          }

          // Capacities
          IReadOnlyList<int> capacities = group.Capacity;
          foreach (int capacity in capacities)
          {
            Console.WriteLine($"Capacity: {capacity}");
          }
        }
      }
      
      // Use the telecom domain network to get additional information about the network.
      IReadOnlyList<WavelengthScheme> wavelengthSchemes = telecomDomainNetwork.WavelengthSchemes;
      IReadOnlyList<DividePolicy> dividePolicies = telecomDomainNetwork.DividePolicies;
      IReadOnlyList<CombinePolicy> combinePolicies = telecomDomainNetwork.CombinePolicies;
      IReadOnlyList<string> diagramTemplateNames = telecomDomainNetwork.DiagramTemplateNames;
    }
  }
});