GIS Need a Mapping sdk for turn by turn navigation API on Win CE c#

I need to develop an on vehicle mapping program for开发者_JAVA技巧 a Windows CE device Think like youre regular satnav program with pre defined routes and a few extras

I need a c# gis mapping SDK that I can use

It must:

• have Cheap licensing model, (Google maps might work but a commercial license is too expensive as it's per device)
• Support for Vector and Raster maps
• Turn by turn routing & route calculation

Can anyone recommend a mapping API to me or give me a list of vendors? Thanks Ro

This may be of use to anyone else searching I found the best places to search were for companies who provide iphone apps for navigation

www.sygic.com have a pretty good naviagation app and also sell an iphone app