using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices; // for StructLayout, DllImport
using System.Windows.Forms;
using System.IO;

using Autodesk.Revit.DB;

namespace GF.Revit.Sample
{
  #region Enums
  public enum BIC_AllowsBoundParametersAsType
  {
    ///<summary>Analytical Links</summary>
    OST_LinksAnalytical = BuiltInCategory.OST_LinksAnalytical,
    ///<summary>Structural Connections</summary>
    OST_StructConnections = BuiltInCategory.OST_StructConnections,
    ///<summary>Structural Fabric Areas</summary>
    OST_FabricAreas = BuiltInCategory.OST_FabricAreas,
    ///<summary>Structural Fabric Reinforcement</summary>
    OST_FabricReinforcement = BuiltInCategory.OST_FabricReinforcement,
    ///<summary>Rebar Shape</summary>
    OST_RebarShape = BuiltInCategory.OST_RebarShape,
    ///<summary>Structural Path Reinforcement</summary>
    OST_PathRein = BuiltInCategory.OST_PathRein,
    ///<summary>Structural Area Reinforcement</summary>
    OST_AreaRein = BuiltInCategory.OST_AreaRein,
    ///<summary>Structural Rebar</summary>
    OST_Rebar = BuiltInCategory.OST_Rebar,
    ///<summary>Pipe Placeholders</summary>
    OST_PlaceHolderPipes = BuiltInCategory.OST_PlaceHolderPipes,
    ///<summary>Duct Placeholders</summary>
    OST_PlaceHolderDucts = BuiltInCategory.OST_PlaceHolderDucts,
    ///<summary>Cable Tray Runs</summary>
    OST_CableTrayRun = BuiltInCategory.OST_CableTrayRun,
    ///<summary>Conduit Runs</summary>
    OST_ConduitRun = BuiltInCategory.OST_ConduitRun,
    ///<summary>Conduits</summary>
    OST_Conduit = BuiltInCategory.OST_Conduit,
    ///<summary>Cable Trays</summary>
    OST_CableTray = BuiltInCategory.OST_CableTray,
    ///<summary>Conduit Fittings</summary>
    OST_ConduitFitting = BuiltInCategory.OST_ConduitFitting,
    ///<summary>Cable Tray Fittings</summary>
    OST_CableTrayFitting = BuiltInCategory.OST_CableTrayFitting,
    ///<summary>Duct Linings</summary>
    OST_DuctLinings = BuiltInCategory.OST_DuctLinings,
    ///<summary>Duct Insulations</summary>
    OST_DuctInsulations = BuiltInCategory.OST_DuctInsulations,
    ///<summary>Pipe Insulations</summary>
    OST_PipeInsulations = BuiltInCategory.OST_PipeInsulations,
    ///<summary>Switch System</summary>
    OST_SwitchSystem = BuiltInCategory.OST_SwitchSystem,
    ///<summary>Sprinklers</summary>
    OST_Sprinklers = BuiltInCategory.OST_Sprinklers,
    ///<summary>Lighting Devices</summary>
    OST_LightingDevices = BuiltInCategory.OST_LightingDevices,
    ///<summary>Fire Alarm Devices</summary>
    OST_FireAlarmDevices = BuiltInCategory.OST_FireAlarmDevices,
    ///<summary>Data Devices</summary>
    OST_DataDevices = BuiltInCategory.OST_DataDevices,
    ///<summary>Communication Devices</summary>
    OST_CommunicationDevices = BuiltInCategory.OST_CommunicationDevices,
    ///<summary>Security Devices</summary>
    OST_SecurityDevices = BuiltInCategory.OST_SecurityDevices,
    ///<summary>Nurse Call Devices</summary>
    OST_NurseCallDevices = BuiltInCategory.OST_NurseCallDevices,
    ///<summary>Telephone Devices</summary>
    OST_TelephoneDevices = BuiltInCategory.OST_TelephoneDevices,
    ///<summary>Pipe Accessories</summary>
    OST_PipeAccessory = BuiltInCategory.OST_PipeAccessory,
    ///<summary>Flex Pipes</summary>
    OST_FlexPipeCurves = BuiltInCategory.OST_FlexPipeCurves,
    ///<summary>Pipe Fittings</summary>
    OST_PipeFitting = BuiltInCategory.OST_PipeFitting,
    ///<summary>Pipes</summary>
    OST_PipeCurves = BuiltInCategory.OST_PipeCurves,
    ///<summary>Piping Systems</summary>
    OST_PipingSystem = BuiltInCategory.OST_PipingSystem,
    ///<summary>Wires</summary>
    OST_Wire = BuiltInCategory.OST_Wire,
    ///<summary>Flex Ducts</summary>
    OST_FlexDuctCurves = BuiltInCategory.OST_FlexDuctCurves,
    ///<summary>Duct Accessories</summary>
    OST_DuctAccessory = BuiltInCategory.OST_DuctAccessory,
    ///<summary>Duct Systems</summary>
    OST_DuctSystem = BuiltInCategory.OST_DuctSystem,
    ///<summary>Air Terminals</summary>
    OST_DuctTerminal = BuiltInCategory.OST_DuctTerminal,
    ///<summary>Duct Fittings</summary>
    OST_DuctFitting = BuiltInCategory.OST_DuctFitting,
    ///<summary>Ducts</summary>
    OST_DuctCurves = BuiltInCategory.OST_DuctCurves,
    ///<summary>Mass</summary>
    OST_Mass = BuiltInCategory.OST_Mass,
    ///<summary>Detail Items</summary>
    OST_DetailComponents = BuiltInCategory.OST_DetailComponents,
    ///<summary>Floors.Slab Edges</summary>
    OST_EdgeSlab = BuiltInCategory.OST_EdgeSlab,
    ///<summary>Roofs.Gutters</summary>
    OST_Gutter = BuiltInCategory.OST_Gutter,
    ///<summary>Roofs.Fascias</summary>
    OST_Fascia = BuiltInCategory.OST_Fascia,
    ///<summary>Planting</summary>
    OST_Planting = BuiltInCategory.OST_Planting,
    ///<summary>Structural Stiffeners</summary>
    OST_StructuralStiffener = BuiltInCategory.OST_StructuralStiffener,
    ///<summary>Specialty Equipment</summary>
    OST_SpecialityEquipment = BuiltInCategory.OST_SpecialityEquipment,
    ///<summary>Topography</summary>
    OST_Topography = BuiltInCategory.OST_Topography,
    ///<summary>Structural Trusses</summary>
    OST_StructuralTruss = BuiltInCategory.OST_StructuralTruss,
    ///<summary>Structural Columns</summary>
    OST_StructuralColumns = BuiltInCategory.OST_StructuralColumns,
    ///<summary>Structural Beam Systems</summary>
    OST_StructuralFramingSystem = BuiltInCategory.OST_StructuralFramingSystem,
    ///<summary>Structural Framing</summary>
    OST_StructuralFraming = BuiltInCategory.OST_StructuralFraming,
    ///<summary>Structural Foundations</summary>
    OST_StructuralFoundation = BuiltInCategory.OST_StructuralFoundation,
    ///<summary>Site.Property Line Segments</summary>
    OST_SitePropertyLineSegment = BuiltInCategory.OST_SitePropertyLineSegment,
    ///<summary>Site.Property Lines</summary>
    OST_SiteProperty = BuiltInCategory.OST_SiteProperty,
    ///<summary>Site.Pads</summary>
    OST_BuildingPad = BuiltInCategory.OST_BuildingPad,
    ///<summary>Site</summary>
    OST_Site = BuiltInCategory.OST_Site,
    ///<summary>Parking</summary>
    OST_Parking = BuiltInCategory.OST_Parking,
    ///<summary>Plumbing Fixtures</summary>
    OST_PlumbingFixtures = BuiltInCategory.OST_PlumbingFixtures,
    ///<summary>Mechanical Equipment</summary>
    OST_MechanicalEquipment = BuiltInCategory.OST_MechanicalEquipment,
    ///<summary>Lighting Fixtures</summary>
    OST_LightingFixtures = BuiltInCategory.OST_LightingFixtures,
    ///<summary>Furniture Systems</summary>
    OST_FurnitureSystems = BuiltInCategory.OST_FurnitureSystems,
    ///<summary>Electrical Fixtures</summary>
    OST_ElectricalFixtures = BuiltInCategory.OST_ElectricalFixtures,
    ///<summary>Electrical Equipment</summary>
    OST_ElectricalEquipment = BuiltInCategory.OST_ElectricalEquipment,
    ///<summary>Casework</summary>
    OST_Casework = BuiltInCategory.OST_Casework,
    ///<summary>Railings.Terminations</summary>
    OST_RailingTermination = BuiltInCategory.OST_RailingTermination,
    ///<summary>Railings.Supports</summary>
    OST_RailingSupport = BuiltInCategory.OST_RailingSupport,
    ///<summary>Railings.Handrails</summary>
    OST_RailingHandRail = BuiltInCategory.OST_RailingHandRail,
    ///<summary>Railings.Top Rails</summary>
    OST_RailingTopRail = BuiltInCategory.OST_RailingTopRail,
    ///<summary>Stairs.Landings</summary>
    OST_StairsLandings = BuiltInCategory.OST_StairsLandings,
    ///<summary>Stairs.Runs</summary>
    OST_StairsRuns = BuiltInCategory.OST_StairsRuns,
    ///<summary>Curtain Systems</summary>
    OST_CurtaSystem = BuiltInCategory.OST_CurtaSystem,
    ///<summary>Assemblies</summary>
    OST_Assemblies = BuiltInCategory.OST_Assemblies,
    ///<summary>Levels</summary>
    OST_Levels = BuiltInCategory.OST_Levels,
    ///<summary>Grids</summary>
    OST_Grids = BuiltInCategory.OST_Grids,
    ///<summary>Walls.Wall Sweeps</summary>
    OST_Cornices = BuiltInCategory.OST_Cornices,
    ///<summary>Ramps</summary>
    OST_Ramps = BuiltInCategory.OST_Ramps,
    ///<summary>Curtain Wall Mullions</summary>
    OST_CurtainWallMullions = BuiltInCategory.OST_CurtainWallMullions,
    ///<summary>Curtain Panels</summary>
    OST_CurtainWallPanels = BuiltInCategory.OST_CurtainWallPanels,
    ///<summary>Generic Models</summary>
    OST_GenericModel = BuiltInCategory.OST_GenericModel,
    ///<summary>Railings</summary>
    OST_StairsRailing = BuiltInCategory.OST_StairsRailing,
    ///<summary>Stairs</summary>
    OST_Stairs = BuiltInCategory.OST_Stairs,
    ///<summary>Columns</summary>
    OST_Columns = BuiltInCategory.OST_Columns,
    ///<summary>Furniture</summary>
    OST_Furniture = BuiltInCategory.OST_Furniture,
    ///<summary>Ceilings</summary>
    OST_Ceilings = BuiltInCategory.OST_Ceilings,
    ///<summary>Roofs</summary>
    OST_Roofs = BuiltInCategory.OST_Roofs,
    ///<summary>Floors</summary>
    OST_Floors = BuiltInCategory.OST_Floors,
    ///<summary>Doors</summary>
    OST_Doors = BuiltInCategory.OST_Doors,
    ///<summary>Windows</summary>
    OST_Windows = BuiltInCategory.OST_Windows,
    ///<summary>Walls</summary>
    OST_Walls = BuiltInCategory.OST_Walls
  }

  public enum BIC_AllowsBoundParametersAsInstance
  {
    ///<summary>Analytical Links</summary>
    OST_LinksAnalytical = BuiltInCategory.OST_LinksAnalytical,
    ///<summary>Analytical Nodes</summary>
    OST_AnalyticalNodes = BuiltInCategory.OST_AnalyticalNodes,
    ///<summary>Analytical Foundation Slabs</summary>
    OST_FoundationSlabAnalytical = BuiltInCategory.OST_FoundationSlabAnalytical,
    ///<summary>Analytical Wall Foundations</summary>
    OST_WallFoundationAnalytical = BuiltInCategory.OST_WallFoundationAnalytical,
    ///<summary>Analytical Isolated Foundations</summary>
    OST_IsolatedFoundationAnalytical = BuiltInCategory.OST_IsolatedFoundationAnalytical,
    ///<summary>Analytical Walls</summary>
    OST_WallAnalytical = BuiltInCategory.OST_WallAnalytical,
    ///<summary>Analytical Floors</summary>
    OST_FloorAnalytical = BuiltInCategory.OST_FloorAnalytical,
    ///<summary>Analytical Columns</summary>
    OST_ColumnAnalytical = BuiltInCategory.OST_ColumnAnalytical,
    ///<summary>Analytical Braces</summary>
    OST_BraceAnalytical = BuiltInCategory.OST_BraceAnalytical,
    ///<summary>Analytical Beams</summary>
    OST_BeamAnalytical = BuiltInCategory.OST_BeamAnalytical,
    ///<summary>Structural Connections</summary>
    OST_StructConnections = BuiltInCategory.OST_StructConnections,
    ///<summary>Structural Fabric Areas</summary>
    OST_FabricAreas = BuiltInCategory.OST_FabricAreas,
    ///<summary>Structural Fabric Reinforcement</summary>
    OST_FabricReinforcement = BuiltInCategory.OST_FabricReinforcement,
    ///<summary>Rebar Shape</summary>
    OST_RebarShape = BuiltInCategory.OST_RebarShape,
    ///<summary>Structural Path Reinforcement</summary>
    OST_PathRein = BuiltInCategory.OST_PathRein,
    ///<summary>Structural Area Reinforcement</summary>
    OST_AreaRein = BuiltInCategory.OST_AreaRein,
    ///<summary>Structural Rebar</summary>
    OST_Rebar = BuiltInCategory.OST_Rebar,
    ///<summary>Analytical Spaces</summary>
    OST_AnalyticSpaces = BuiltInCategory.OST_AnalyticSpaces,
    ///<summary>Pipe Placeholders</summary>
    OST_PlaceHolderPipes = BuiltInCategory.OST_PlaceHolderPipes,
    ///<summary>Duct Placeholders</summary>
    OST_PlaceHolderDucts = BuiltInCategory.OST_PlaceHolderDucts,
    ///<summary>Cable Tray Runs</summary>
    OST_CableTrayRun = BuiltInCategory.OST_CableTrayRun,
    ///<summary>Conduit Runs</summary>
    OST_ConduitRun = BuiltInCategory.OST_ConduitRun,
    ///<summary>Conduits</summary>
    OST_Conduit = BuiltInCategory.OST_Conduit,
    ///<summary>Cable Trays</summary>
    OST_CableTray = BuiltInCategory.OST_CableTray,
    ///<summary>Conduit Fittings</summary>
    OST_ConduitFitting = BuiltInCategory.OST_ConduitFitting,
    ///<summary>Cable Tray Fittings</summary>
    OST_CableTrayFitting = BuiltInCategory.OST_CableTrayFitting,
    ///<summary>Duct Linings</summary>
    OST_DuctLinings = BuiltInCategory.OST_DuctLinings,
    ///<summary>Duct Insulations</summary>
    OST_DuctInsulations = BuiltInCategory.OST_DuctInsulations,
    ///<summary>Pipe Insulations</summary>
    OST_PipeInsulations = BuiltInCategory.OST_PipeInsulations,
    ///<summary>HVAC Zones</summary>
    OST_HVAC_Zones = BuiltInCategory.OST_HVAC_Zones,
    ///<summary>Switch System</summary>
    OST_SwitchSystem = BuiltInCategory.OST_SwitchSystem,
    ///<summary>Sprinklers</summary>
    OST_Sprinklers = BuiltInCategory.OST_Sprinklers,
    ///<summary>Analytical Surfaces</summary>
    OST_GbXMLFaces = BuiltInCategory.OST_GbXMLFaces,
    ///<summary>Lighting Devices</summary>
    OST_LightingDevices = BuiltInCategory.OST_LightingDevices,
    ///<summary>Fire Alarm Devices</summary>
    OST_FireAlarmDevices = BuiltInCategory.OST_FireAlarmDevices,
    ///<summary>Data Devices</summary>
    OST_DataDevices = BuiltInCategory.OST_DataDevices,
    ///<summary>Communication Devices</summary>
    OST_CommunicationDevices = BuiltInCategory.OST_CommunicationDevices,
    ///<summary>Security Devices</summary>
    OST_SecurityDevices = BuiltInCategory.OST_SecurityDevices,
    ///<summary>Nurse Call Devices</summary>
    OST_NurseCallDevices = BuiltInCategory.OST_NurseCallDevices,
    ///<summary>Telephone Devices</summary>
    OST_TelephoneDevices = BuiltInCategory.OST_TelephoneDevices,
    ///<summary>Pipe Accessories</summary>
    OST_PipeAccessory = BuiltInCategory.OST_PipeAccessory,
    ///<summary>Flex Pipes</summary>
    OST_FlexPipeCurves = BuiltInCategory.OST_FlexPipeCurves,
    ///<summary>Pipe Fittings</summary>
    OST_PipeFitting = BuiltInCategory.OST_PipeFitting,
    ///<summary>Pipes</summary>
    OST_PipeCurves = BuiltInCategory.OST_PipeCurves,
    ///<summary>Piping Systems</summary>
    OST_PipingSystem = BuiltInCategory.OST_PipingSystem,
    ///<summary>Wires</summary>
    OST_Wire = BuiltInCategory.OST_Wire,
    ///<summary>Electrical Circuits</summary>
    OST_ElectricalCircuit = BuiltInCategory.OST_ElectricalCircuit,
    ///<summary>Flex Ducts</summary>
    OST_FlexDuctCurves = BuiltInCategory.OST_FlexDuctCurves,
    ///<summary>Duct Accessories</summary>
    OST_DuctAccessory = BuiltInCategory.OST_DuctAccessory,
    ///<summary>Duct Systems</summary>
    OST_DuctSystem = BuiltInCategory.OST_DuctSystem,
    ///<summary>Air Terminals</summary>
    OST_DuctTerminal = BuiltInCategory.OST_DuctTerminal,
    ///<summary>Duct Fittings</summary>
    OST_DuctFitting = BuiltInCategory.OST_DuctFitting,
    ///<summary>Ducts</summary>
    OST_DuctCurves = BuiltInCategory.OST_DuctCurves,
    ///<summary>Structural Internal Loads.Internal Area Loads</summary>
    OST_InternalAreaLoads = BuiltInCategory.OST_InternalAreaLoads,
    ///<summary>Structural Internal Loads.Internal Line Loads</summary>
    OST_InternalLineLoads = BuiltInCategory.OST_InternalLineLoads,
    ///<summary>Structural Internal Loads.Internal Point Loads</summary>
    OST_InternalPointLoads = BuiltInCategory.OST_InternalPointLoads,
    ///<summary>Structural Loads.Area Loads</summary>
    OST_AreaLoads = BuiltInCategory.OST_AreaLoads,
    ///<summary>Structural Loads.Line Loads</summary>
    OST_LineLoads = BuiltInCategory.OST_LineLoads,
    ///<summary>Structural Loads.Point Loads</summary>
    OST_PointLoads = BuiltInCategory.OST_PointLoads,
    ///<summary>Spaces</summary>
    OST_MEPSpaces = BuiltInCategory.OST_MEPSpaces,
    ///<summary>Mass.Mass Opening</summary>
    OST_MassOpening = BuiltInCategory.OST_MassOpening,
    ///<summary>Mass.Mass Skylight</summary>
    OST_MassSkylights = BuiltInCategory.OST_MassSkylights,
    ///<summary>Mass.Mass Glazing</summary>
    OST_MassWindow = BuiltInCategory.OST_MassWindow,
    ///<summary>Mass.Mass Roof</summary>
    OST_MassRoof = BuiltInCategory.OST_MassRoof,
    ///<summary>Mass.Mass Exterior Wall</summary>
    OST_MassExteriorWall = BuiltInCategory.OST_MassExteriorWall,
    ///<summary>Mass.Mass Interior Wall</summary>
    OST_MassInteriorWall = BuiltInCategory.OST_MassInteriorWall,
    ///<summary>Mass.Mass Zone</summary>
    OST_MassZone = BuiltInCategory.OST_MassZone,
    ///<summary>Mass.Mass Floor</summary>
    OST_MassFloor = BuiltInCategory.OST_MassFloor,
    ///<summary>Mass</summary>
    OST_Mass = BuiltInCategory.OST_Mass,
    ///<summary>Areas</summary>
    OST_Areas = BuiltInCategory.OST_Areas,
    ///<summary>Project Information</summary>
    OST_ProjectInformation = BuiltInCategory.OST_ProjectInformation,
    ///<summary>Sheets</summary>
    OST_Sheets = BuiltInCategory.OST_Sheets,
    ///<summary>Detail Items</summary>
    OST_DetailComponents = BuiltInCategory.OST_DetailComponents,
    ///<summary>Floors.Slab Edges</summary>
    OST_EdgeSlab = BuiltInCategory.OST_EdgeSlab,
    ///<summary>Roofs.Gutters</summary>
    OST_Gutter = BuiltInCategory.OST_Gutter,
    ///<summary>Roofs.Fascias</summary>
    OST_Fascia = BuiltInCategory.OST_Fascia,
    ///<summary>Planting</summary>
    OST_Planting = BuiltInCategory.OST_Planting,
    ///<summary>Structural Stiffeners</summary>
    OST_StructuralStiffener = BuiltInCategory.OST_StructuralStiffener,
    ///<summary>Specialty Equipment</summary>
    OST_SpecialityEquipment = BuiltInCategory.OST_SpecialityEquipment,
    ///<summary>Topography</summary>
    OST_Topography = BuiltInCategory.OST_Topography,
    ///<summary>Structural Trusses</summary>
    OST_StructuralTruss = BuiltInCategory.OST_StructuralTruss,
    ///<summary>Structural Columns</summary>
    OST_StructuralColumns = BuiltInCategory.OST_StructuralColumns,
    ///<summary>Structural Beam Systems</summary>
    OST_StructuralFramingSystem = BuiltInCategory.OST_StructuralFramingSystem,
    ///<summary>Structural Framing</summary>
    OST_StructuralFraming = BuiltInCategory.OST_StructuralFraming,
    ///<summary>Structural Foundations</summary>
    OST_StructuralFoundation = BuiltInCategory.OST_StructuralFoundation,
    ///<summary>Site.Property Line Segments</summary>
    OST_SitePropertyLineSegment = BuiltInCategory.OST_SitePropertyLineSegment,
    ///<summary>Site.Property Lines</summary>
    OST_SiteProperty = BuiltInCategory.OST_SiteProperty,
    ///<summary>Site.Pads</summary>
    OST_BuildingPad = BuiltInCategory.OST_BuildingPad,
    ///<summary>Site</summary>
    OST_Site = BuiltInCategory.OST_Site,
    ///<summary>Roads</summary>
    OST_Roads = BuiltInCategory.OST_Roads,
    ///<summary>Parking</summary>
    OST_Parking = BuiltInCategory.OST_Parking,
    ///<summary>Plumbing Fixtures</summary>
    OST_PlumbingFixtures = BuiltInCategory.OST_PlumbingFixtures,
    ///<summary>Mechanical Equipment</summary>
    OST_MechanicalEquipment = BuiltInCategory.OST_MechanicalEquipment,
    ///<summary>Lighting Fixtures</summary>
    OST_LightingFixtures = BuiltInCategory.OST_LightingFixtures,
    ///<summary>Furniture Systems</summary>
    OST_FurnitureSystems = BuiltInCategory.OST_FurnitureSystems,
    ///<summary>Electrical Fixtures</summary>
    OST_ElectricalFixtures = BuiltInCategory.OST_ElectricalFixtures,
    ///<summary>Electrical Equipment</summary>
    OST_ElectricalEquipment = BuiltInCategory.OST_ElectricalEquipment,
    ///<summary>Casework</summary>
    OST_Casework = BuiltInCategory.OST_Casework,
    ///<summary>Shaft Openings</summary>
    OST_ShaftOpening = BuiltInCategory.OST_ShaftOpening,
    ///<summary>Railings.Terminations</summary>
    OST_RailingTermination = BuiltInCategory.OST_RailingTermination,
    ///<summary>Railings.Supports</summary>
    OST_RailingSupport = BuiltInCategory.OST_RailingSupport,
    ///<summary>Railings.Handrails</summary>
    OST_RailingHandRail = BuiltInCategory.OST_RailingHandRail,
    ///<summary>Railings.Top Rails</summary>
    OST_RailingTopRail = BuiltInCategory.OST_RailingTopRail,
    ///<summary>Stairs.Landings</summary>
    OST_StairsLandings = BuiltInCategory.OST_StairsLandings,
    ///<summary>Stairs.Runs</summary>
    OST_StairsRuns = BuiltInCategory.OST_StairsRuns,
    ///<summary>Materials</summary>
    OST_Materials = BuiltInCategory.OST_Materials,
    ///<summary>Curtain Systems</summary>
    OST_CurtaSystem = BuiltInCategory.OST_CurtaSystem,
    ///<summary>Views</summary>
    OST_Views = BuiltInCategory.OST_Views,
    ///<summary>Parts</summary>
    OST_Parts = BuiltInCategory.OST_Parts,
    ///<summary>Assemblies</summary>
    OST_Assemblies = BuiltInCategory.OST_Assemblies,
    ///<summary>Levels</summary>
    OST_Levels = BuiltInCategory.OST_Levels,
    ///<summary>Grids</summary>
    OST_Grids = BuiltInCategory.OST_Grids,
    ///<summary>Walls.Wall Sweeps</summary>
    OST_Cornices = BuiltInCategory.OST_Cornices,
    ///<summary>Ramps</summary>
    OST_Ramps = BuiltInCategory.OST_Ramps,
    ///<summary>Curtain Wall Mullions</summary>
    OST_CurtainWallMullions = BuiltInCategory.OST_CurtainWallMullions,
    ///<summary>Curtain Panels</summary>
    OST_CurtainWallPanels = BuiltInCategory.OST_CurtainWallPanels,
    ///<summary>Rooms</summary>
    OST_Rooms = BuiltInCategory.OST_Rooms,
    ///<summary>Generic Models</summary>
    OST_GenericModel = BuiltInCategory.OST_GenericModel,
    ///<summary>Railings</summary>
    OST_StairsRailing = BuiltInCategory.OST_StairsRailing,
    ///<summary>Stairs</summary>
    OST_Stairs = BuiltInCategory.OST_Stairs,
    ///<summary>Columns</summary>
    OST_Columns = BuiltInCategory.OST_Columns,
    ///<summary>Furniture</summary>
    OST_Furniture = BuiltInCategory.OST_Furniture,
    ///<summary>Ceilings</summary>
    OST_Ceilings = BuiltInCategory.OST_Ceilings,
    ///<summary>Roofs</summary>
    OST_Roofs = BuiltInCategory.OST_Roofs,
    ///<summary>Floors</summary>
    OST_Floors = BuiltInCategory.OST_Floors,
    ///<summary>Doors</summary>
    OST_Doors = BuiltInCategory.OST_Doors,
    ///<summary>Windows</summary>
    OST_Windows = BuiltInCategory.OST_Windows,
    ///<summary>Walls</summary>
    OST_Walls = BuiltInCategory.OST_Walls
  }
  #endregion
}

// <code snip usage example>

bool bKindOfBinding = false; // true = Instance, false = Type
bool bStatus = true;
string szBIC_Name = "OST_MechanicalEquipment"
Autodesk.Revit.DB.CategorySet catSet = app.Create.NewCategorySet();

if (bKindOfBinding)
{
  BIC_AllowsBoundParametersAsInstance BIC_ToInsert;

  if (Enum.TryParse<BIC_AllowsBoundParametersAsInstance>(szBIC_Name, out BIC_ToInsert))
  {
    catSet.Insert(doc.Settings.Categories.get_Item((BuiltinCategory)BIC_ToInsert));
  }
  else
  {
    // Invalid Category
    bStatus = false;
  }
  else
  {
    BIC_AllowsBoundParametersAsType BIC_ToInsert;

    if (Enum.TryParse<BIC_AllowsBoundParametersAsType>(szBIC_Name, out BIC_ToInsert))
    {
      catSet.Insert(doc.Settings.Categories.get_Item((BuiltinCategory)BIC_ToInsert));
    }
    else
    {
      // Invalid Category
      bStatus = false;
    }
}

if(bStatus)
{
    Autodesk.Revit.DB.Binding binding = bKindOfBinding
    ? app.Create.NewTypeBinding(catSet) as Autodesk.Revit.DB.Binding
    : app.Create.NewInstanceBinding(catSet) as Autodesk.Revit.DB.Binding;

    doc.ParameterBindings.Insert(.......
}
else
{
// Notify User Invalid Category was given....
}

//==============================

// test for enum equlity

// Without cast
if (BuiltInCategory.OST_MechanicalEquipment.Equals(BIC_AllowsBoundParametersAsType.OST_MechanicalEquipment))
{
    szMessage = "We are Equal";
}
else
{
  // we get here
    szMessage = "We are not Equal";
}
MessageBox.Show(szMessage);

// With cast
if (BuiltInCategory.OST_MechanicalEquipment.Equals((BuiltInCategory)BIC_AllowsBoundParametersAsType.OST_MechanicalEquipment))
{
  // we get here
    szMessage = "We are Equal";
}
else
{
    szMessage = "We are not Equal";
}
MessageBox.Show(szMessage);