Namespaces
- Autodesk.Revit.ApplicationServices
- Autodesk.Revit.Attributes
- Autodesk.Revit.Creation
- Autodesk.Revit.DB
- Autodesk.Revit.DB.Analysis
- Autodesk.Revit.DB.Architecture
- Autodesk.Revit.DB.DirectContext3D
- Autodesk.Revit.DB.Electrical
- Autodesk.Revit.DB.Events
- Autodesk.Revit.DB.ExtensibleStorage
- Autodesk.Revit.DB.ExternalService
- Autodesk.Revit.DB.Fabrication
- Autodesk.Revit.DB.IFC
  - ExporterIFC Class
  - ExporterIFCUtils Class
  - HostObjectSubcomponentInfo Class
  - IExporterIFC Interface
  - IFCAggregate Class
  - IFCAggregateIterator Class
  - IFCAnyHandle Class
  - IFCConnectedWallData Class
  - IFCConnectedWallDataLocation Enumeration
  - IFCData Class
  - IFCDataPrimitiveType Enumeration
  - IFCExtrusionAxes Enumeration
  - IFCExtrusionBasis Enumeration
  - IFCExtrusionCalculatorOptions Class
  - IFCExtrusionCalculatorUtils Class
  - IFCExtrusionCreationData Class
  - IFCExtrusionData Class
  - IFCFamilyInstanceExtrusionExportResults Class
  - IFCFile Class
  - IFCFileFormat Enumeration
  - IFCFileModelOptions Class
  - IFCFileReadOptions Class
  - IFCFileWriteOptions Class
  - IFCGeometryInfo Class
  - IFCGuidKey Class
    - IFCGuidKey Constructor
    - IFCGuidKey Properties
    - IFCGuidKey Methods
  - IFCHybridImport Class
  - IFCHybridImportOptions Class
  - IFCImportAction Enumeration
  - IFCImportIntent Enumeration
  - IFCImportOptions Class
  - IFCLegacyStairOrRamp Class
  - IFCLevelInfo Class
  - IFCLinkDocumentExportScope Class
  - IFCLinkOrientation Enumeration
  - IFCLinkPosition Enumeration
  - IFCLogical Enumeration
  - IFCOpeningData Class
  - IFCProductWrapper Class
  - IFCProjectLevelGUIDType Enumeration
  - IFCRange Class
  - IFCTransaction Class
  - IFCTransformSetter Class
  - IIFCImporterServer Interface
  - ImporterIFC Class
  - ImporterIFCUtils Class
  - RoofComponents Class
- Autodesk.Revit.DB.Infrastructure
- Autodesk.Revit.DB.Lighting
- Autodesk.Revit.DB.Macros
- Autodesk.Revit.DB.Mechanical
- Autodesk.Revit.DB.Plumbing
- Autodesk.Revit.DB.PointClouds
- Autodesk.Revit.DB.Steel
- Autodesk.Revit.DB.Structure
- Autodesk.Revit.DB.Structure.StructuralSections
- Autodesk.Revit.DB.Visual
- Autodesk.Revit.Exceptions
- Autodesk.Revit.UI
- Autodesk.Revit.UI.Events
- Autodesk.Revit.UI.Macros
- Autodesk.Revit.UI.Mechanical
- Autodesk.Revit.UI.Plumbing
- Autodesk.Revit.UI.Selection
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Revit .NET 8 Upgrade Tips

IFCGuidKey Constructor

Revit 2026 API

IFCGuidKey Constructor

Overload List

	Name	Description
	IFCGuidKey(IFCGuidKey)	IFCGuidKey can be used in managed code as well as unmanaged.
	IFCGuidKey(String)	Constructs a new IFCHybridGuid

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Reference

IFCGuidKey Class

Autodesk.Revit.DB.IFC Namespace

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Overload:Autodesk.Revit.DB.IFC.IFCGuidKey.#ctor