The DGN file format is a CAD (Computer-Aided Design) file format primarily associated with Bentley Systems' MicroStation and other CAD applications. It is used to store 2D and 3D vector graphics data, including lines, shapes, text, and other design elements. DGN files are commonly employed in architecture, engineering, construction (AEC), and geospatial industries for creating and managing detailed designs of buildings, infrastructure, and other projects. The format supports a wide range of geometric primitives, complex elements, and metadata, allowing for precise and comprehensive representation of design information. DGN files can also contain references to other files, enabling the creation of complex assemblies and collaborative workflows. The format has evolved over time, with different versions offering varying levels of functionality and compatibility. It is a widely used format in the infrastructure design and management space, often used for large-scale projects involving complex geometries and data relationships. DGN files are often used in conjunction with other file formats, such as DWG, for interoperability between different CAD systems.