How to create geometric networks within a geodatabase

public void CreateGeometricNetwork(IWorkspace workspace, IFeatureDatasetName    featureDatasetName){    // Create a network loader.    INetworkLoader2 networkLoader2 = new NetworkLoaderClass();    // Set the network name.    networkLoader2.NetworkName = "Water_Net";    // Set the network type.    networkLoader2.NetworkType = esriNetworkType.esriNTUtilityNetwork;    // Set the containing feature dataset.    networkLoader2.FeatureDatasetName = (IDatasetName)featureDatasetName;    // Add the two classes to the network.    if (networkLoader2.CanUseFeatureClass("Distribmains") ==        esriNetworkLoaderFeatureClassCheck.esriNLFCCValid)    {        networkLoader2.AddFeatureClass("Distribmains",            esriFeatureType.esriFTComplexEdge, null, false);    }    if (networkLoader2.CanUseFeatureClass("Tanks") ==        esriNetworkLoaderFeatureClassCheck.esriNLFCCValid)    {        networkLoader2.AddFeatureClass("Tanks", esriFeatureType.esriFTSimpleJunction,            null, false);    }    // Set the enabled field for the distribmains class.    INetworkLoaderProps networkLoaderProps = (INetworkLoaderProps)networkLoader2;    String defaultEnabledFieldName = networkLoaderProps.DefaultEnabledField;    esriNetworkLoaderFieldCheck enabledFieldCheck =        networkLoader2.CheckEnabledDisabledField("Tanks", defaultEnabledFieldName);    switch (enabledFieldCheck)    {        case esriNetworkLoaderFieldCheck.esriNLFCValid:        case esriNetworkLoaderFieldCheck.esriNLFCNotFound:            networkLoader2.PutEnabledDisabledFieldName("Tanks",                defaultEnabledFieldName);            break;        default:            Console.WriteLine(                "The field {0} could not be used as an enabled/disabled field.",                defaultEnabledFieldName);            break;    }    networkLoader2.PreserveEnabledValues = true;    // Set the ancillary role field for the tanks class.    String defaultAncillaryRoleFieldName =        networkLoaderProps.DefaultAncillaryRoleField;    esriNetworkLoaderFieldCheck ancillaryRoleFieldCheck =        networkLoader2.CheckAncillaryRoleField("Tanks",        defaultAncillaryRoleFieldName);    switch (ancillaryRoleFieldCheck)    {        case esriNetworkLoaderFieldCheck.esriNLFCValid:        case esriNetworkLoaderFieldCheck.esriNLFCNotFound:            networkLoader2.PutAncillaryRole("Tanks",                esriNetworkClassAncillaryRole.esriNCARSourceSink,                defaultAncillaryRoleFieldName);            break;        default:            Console.WriteLine(                "The field {0} could not be used as an ancillary role field.",                defaultAncillaryRoleFieldName);            break;    }    // If the geodatabase is an SDE GDB, set the configuration keyword.    if (workspace.Type == esriWorkspaceType.esriRemoteDatabaseWorkspace)    {        networkLoader2.ConfigurationKeyword = "Network_Defaults";    }    // Set the snap tolerance for the network.    networkLoader2.SnapTolerance = networkLoader2.MinSnapTolerance;    // Add a weight with a double type to the network.    networkLoader2.AddWeight("MainWeight", esriWeightType.esriWTDouble, 0);    // For weights of type esriWTBitGate, the BitGateSize parameter should be set:    networkLoader2.AddWeight("WTBitGateEx", esriWeightType.esriWTBitGate, 5);    // Associate the MainWeight weight with the DIAMETER field of Distribmains.    networkLoader2.AddWeightAssociation("MainWeight", "Distribmains", "DIAMETER");    // Load the network.    networkLoader2.LoadNetwork();    // Get the name of the network's error table.    String errorTableName = networkLoader2.ErrorTableName;    // Display the number of invalid features in the Distribmains class.    int numInvalidFeatures = networkLoader2.get_NumInvalidFeatures("Distribmains");    Console.WriteLine("Distribmains contains {0} invalid features.",        numInvalidFeatures);    // Display the number of invalid features in the network.    int totalNumInvalidFeatures = networkLoader2.TotalNumInvalidFeatures;    Console.WriteLine("The network contains {0} invalid features.",        totalNumInvalidFeatures);}