What type of file does Microstation primarily create?

Microstation primarily creates files with the DGN extension. This format is specifically designed for use with Microstation software, which is a CAD application developed by Bentley Systems. DGN files support 2D and 3D design, allowing users to create complex engineering and architectural models. The DGN format provides advanced capabilities such as support for layers, attributes, and rich metadata, which are essential for professional-level design work.

In contrast, other file formats mentioned have their own specific applications: DWG is associated primarily with Autodesk's AutoCAD, KML is used for geographic data visualization in applications like Google Earth, and DXF serves as a CAD data file format that facilitates interoperability between various CAD programs. Therefore, while these files are important in their own contexts, they do not relate directly to Microstation as the DGN file format does.