[CAD File Format APIs for .NET Open Source .NET APIs for CAD Files Create, Read & Modify CAD File Formats via .NET APIs CAD File Format APIs for .NET Include netDxf An Open Source .NET 3D APIs for Working with AutoCAD DXF Files. It allows to read and write AutoCAD DXF Files. ACadSharp A powerful Open Source C# .NET CAD Library to open, read and write AutoCAD DXF & DWG drawings via free .NET API.]