Select dwg file in local directory and by FileStream ready the autocad file by binaryreader. Save Bitmap data in memorystream and convert to Bitmap as shown in c# code snippet.
This code doesn't required to install autocad program , this will be ideal to preview autocad dwg file before opening it which will save considerable time.
Autocad Dwg Viewer Online
AutoCAD viewer Online, available in this site eCadViewer.com view any CAD files dwg or dxf, support any AutoCAD version from r14 to the latest version. Open any dwg file with Open 2D, 3D, Model View, layout