Export terrain in all formats available such as dtm, tin, xml, fil

The below code shows exporting the terrain into the file with the formats like *.dtm, *.tin, *.xml etc.
//Required References
using System;
using System.Collections.Generic;
using System.Linq;
using System.Diagnostics;
using Bentley.CifNET.GeometryModel.SDK;
using Bentley.CifNET.SDK;
using Bentley.GeometryNET;
using Bentley.MstnPlatformNET;
using Bentley.CifNET.TerrainModel.ImportExport;

public void ExportTerrain()
        {
            try
            {
                string exportFileName = "D:\\Output\\TerrainExported";

                //Get active dgn model
                Bentley.DgnPlatformNET.DgnModel dgnModel = Session.Instance.GetActiveDgnModel();
                //Create connection to dgnModel
                Bentley.CifNET.SDK.ConsensusConnection consensusConnection = new ConsensusConnection(dgnModel);
                //Get active geometric model
                Bentley.CifNET.GeometryModel.SDK.GeometricModel geometricModel = consensusConnection.GetActiveGeometricModel();
                if (geometricModel.ActiveSurface == null) return;
                List<DPoint3d> pointList = new List<DPoint3d>();
                //Get active terrain
                Bentley.CifNET.GeometryModel.SDK.TerrainSurface terrainSurface = geometricModel.ActiveSurface as TerrainSurface;
                if (terrainSurface == null) return;

                //Get terrain import export manager
                Bentley.CifNET.TerrainModel.ImportExport.DTMImportExportManager dTMImportExportManager = DTMImportExportManager.Instance;
                if (dTMImportExportManager == null) return;

                //Get list of terrain providers
                Dictionary<string, DTMImportExportProvider> keyValuePairs = dTMImportExportManager.GetProviders();

                //Export terrain with available providers for export
                Bentley.TerrainModelNET.Formats.FileUnit unit = Bentley.TerrainModelNET.Formats.FileUnit.Foot;
                foreach (System.Collections.Generic.KeyValuePair<string, DTMImportExportProvider> providers in DTMImportExportManager.Instance.GetProviders())
                {
                    string key = providers.Key;
                    DTMImportExportProvider provider = providers.Value;
                    bool canExport = provider.CanExport;
                    if (canExport)
                    {
                        string fileNameWithExt = exportFileName + provider.FileFilter.Split('*').Last();
                        provider.ExportDTM(terrainSurface.DTM, fileNameWithExt, terrainSurface.Name, false, unit);
                    }
                }
            }
            catch (Exception ex)
            {
                Trace.WriteLine(ex.Message);
            }
        }