DXF Import .NET is an easy-to-use API for reading AutoCAD DXF in C# and VB.NET applications.
Download now:
http://www.cadsofttools.com/download/dxfimportnet.zip
web-site:
http://www.cadsofttools.com
It is completely programmed in C# and supports the following entities:
3dFace
Arc
Attdef
Block
BlockRecord
Circle
Dimension
Ellipse
Insert
Layer
Line
LWPolyline
MText
TableItem
Polyline
Solid
Style
Table
Text

and properties:
Extrusion
LineType
Color
3D rotation
and other

The package consists of demos for C# and VB.NET, help and license. Viewer demo shows usage the product for viewing DXF, zooming and exporting to BMP and JPEG.
SimpleImport demo explains access to extensive properties of each CAD entity which is supported by DXF Import .NET.