Create Route Layer Snippet

///<summary>Create a new route layer.</summary>
///  
///<param name="networkDataset">An INetworkDataset interface that is the network dataset on which to perform the route analysis.</param>
///  
///<returns>An INALayer3 interface that is the newly created network analysis layer.</returns>
public static ESRI.ArcGIS.NetworkAnalyst.INALayer3 CreateRouteLayer(ESRI.ArcGIS.Geodatabase.INetworkDataset networkDataset)
{
  ESRI.ArcGIS.NetworkAnalyst.INARouteSolver naRouteSolver = new ESRI.ArcGIS.NetworkAnalyst.NARouteSolverClass();
  ESRI.ArcGIS.NetworkAnalyst.INASolver naSolver = naRouteSolver as ESRI.ArcGIS.NetworkAnalyst.INASolver; // Dynamic Cast

  ESRI.ArcGIS.Geodatabase.IDatasetComponent datasetComponent = networkDataset as ESRI.ArcGIS.Geodatabase.IDatasetComponent; // Dynamic Cast
  ESRI.ArcGIS.Geodatabase.IDENetworkDataset deNetworkDataset = datasetComponent.DataElement as ESRI.ArcGIS.Geodatabase.IDENetworkDataset; // Dynamic Cast
  ESRI.ArcGIS.NetworkAnalyst.INAContext naContext = naSolver.CreateContext(deNetworkDataset, naSolver.Name);
  ESRI.ArcGIS.NetworkAnalyst.INAContextEdit naContextEdit = naContext as ESRI.ArcGIS.NetworkAnalyst.INAContextEdit; // Dynamic Cast

  ESRI.ArcGIS.Geodatabase.IGPMessages gpMessages = new ESRI.ArcGIS.Geodatabase.GPMessagesClass();
  naContextEdit.Bind(networkDataset, gpMessages);

  ESRI.ArcGIS.NetworkAnalyst.INALayer naLayer = naSolver.CreateLayer(naContext);
  ESRI.ArcGIS.NetworkAnalyst.INALayer3 naLayer3 = naLayer as ESRI.ArcGIS.NetworkAnalyst.INALayer3; // Dynamic Cast

  return naLayer3;
}

'''<summary>Create a new route layer.</summary>
'''  
'''<param name="networkDataset">An INetworkDataset interface that is the network dataset on which to perform the route analysis.</param>
'''  
'''<returns>An INALayer3 interface that is the newly created network analysis layer.</returns>
Public Shared Function CreateRouteLayer(ByVal networkDataset As ESRI.ArcGIS.Geodatabase.INetworkDataset) As ESRI.ArcGIS.NetworkAnalyst.INALayer3

  Dim naRouteSolver As ESRI.ArcGIS.NetworkAnalyst.INARouteSolver = New ESRI.ArcGIS.NetworkAnalyst.NARouteSolverClass
  Dim naSolver As ESRI.ArcGIS.NetworkAnalyst.INASolver = CType(naRouteSolver, ESRI.ArcGIS.NetworkAnalyst.INASolver) ' Explicit Cast

  Dim datasetComponent As ESRI.ArcGIS.Geodatabase.IDatasetComponent = CType(networkDataset, ESRI.ArcGIS.Geodatabase.IDatasetComponent) ' Explicit Cast
  Dim deNetworkDataset As ESRI.ArcGIS.Geodatabase.IDENetworkDataset = CType(datasetComponent.DataElement, ESRI.ArcGIS.Geodatabase.IDENetworkDataset) ' Explicit Cast
  Dim naContext As ESRI.ArcGIS.NetworkAnalyst.INAContext = naSolver.CreateContext(deNetworkDataset, naSolver.Name)
  Dim naContextEdit As ESRI.ArcGIS.NetworkAnalyst.INAContextEdit = CType(naContext, ESRI.ArcGIS.NetworkAnalyst.INAContextEdit) ' Explicit Cast

  Dim gpMessages As ESRI.ArcGIS.Geodatabase.IGPMessages = New ESRI.ArcGIS.Geodatabase.GPMessagesClass
  naContextEdit.Bind(networkDataset, gpMessages)

  Dim naLayer As ESRI.ArcGIS.NetworkAnalyst.INALayer = naSolver.CreateLayer(naContext)
  Dim naLayer3 As ESRI.ArcGIS.NetworkAnalyst.INALayer3 = CType(naLayer, ESRI.ArcGIS.NetworkAnalyst.INALayer3) ' Explicit Cast

  Return naLayer3

End Function