Build your CAD files viewer in C# to view drawings. Convert DWG, DGN to render as HTML, JPG, PNG, or PDF using document viewer .NET API by GroupDocs....the well-known AutoCAD file formats are DWG, DXF, DGN, DWF . We...In addition to DWG, the API supports DWF, DGN, DWT, DXF, IFC, STL...