It sounds like you are working on a .Net Compact Framework app for a Windows Embedded or CE based mobile device. If not, let us know what device you are targeting. If the above is correct, you will want to install the EMDK for .Net. And if you need to post more questions about that platform, you should post under Mobile Computing and provide more details like target device/os so we can better help you.
I am working on a mc55. It is running the following OS:
Windows Embedded Handheld 6.5 Classic
CE OS 5.2.29344 (Build 293188.8.131.52.40)
(c) 2009 Microsoft Corporation
I am pretty sure it is not either one of the two types you mentioned, but rather the one called Windows Mobile 6.5. So I still need the file I mentioned.If you can direct me in the right direction I would be vere gratefull.