Use C# .NET AutoCAD to PDF converter to convert DWG or DXF to PDF in C#. You can convert DWG, DWF, DWT and DXF to PDF, JPEG, PNG, BMP, GIF and TIFF in C# .NET as well....shrinks the image to fit the canvas size. Switch to GrowToFit mode...the Model layout. Setting the Canvas Size & Mode Export from CAD...